Grades 1–2 Free Printable PDF • Sectioned Answer Keys

100th Day of School Math Pack (Grades 1–2)

For 1st and 2nd grade teachers and homeschool families celebrating the 100th day with skip counting, number comparisons, two-digit operations, and festive story problems.

About This Weekly Practice Pack

Target Audience & Setting

Designed for 1st and 2nd grade classrooms celebrating the 100th day of school with focused arithmetic and number sense practice.

Key Mathematical Stamina

Develops skip counting fluency by 5s and 10s, solidifies inequality comparisons up to 100, reinforces two-digit addition and subtraction fact families without regrouping, and applies problem-solving strategies to real 100-day celebration stories.

Grades 1–2 5 Curated Sections • 48 Total Problems

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Worksheet Mill Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2)

Section 1 of 5: Skip Counting to 100 by 5s & 10s on Number Lines
Name: ________________________________ Date: ____________________ Score: _________

Identify the plotted point, fill in the missing numbers, or use the number lines for practice.

1. Missing number = ?
0 10 20 30 40 50 ? 70 80 90
Missing number:
      
2. Missing number = ?
0 10 20 30 ? 50 60 70 80 90
Missing number:
      
3. Missing number = ?
0 ? 10 15 20 25 30
Missing number:
      
4. Missing number = ?
40 ? 50 55 60 65 70 75 80 85
Missing number:
      
5. Missing number = ?
25 30 35 40 ? 50 55 60
Missing number:
      
6. Missing number = ?
25 30 35 40 45 ? 55 60
Missing number:
      
7. Missing number = ?
15 20 25 30 35 ? 45 50 55 60 65
Missing number:
      
8. Missing number = ?
30 40 ? 60 70 80 90 100
Missing number:
      
Page 1 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2)

Section 2 of 5: Comparing Numbers to 100 (<, >, =)
Name: ________________________________ Date: ____________________ Score: _________

Write >, <, or = in the box to compare the numbers, or arrange the given sequence in the specified order.

1)
79   48
2)
7   76
3)
22   52
4)
89   89
5)
13   3
6)
61   39
7)
52   15
8)
26   73
9)
68   39
10)
55   61
11)
26   22
12)
65   84
Page 2 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2)

Section 3 of 5: Addition Within 100 (No Regrouping)
Name: ________________________________ Date: ____________________ Score: _________

Find the sum for each addition problem.

1) 45 + 21 =     
2) 23 + 43 =     
3) 18 + 0 =     
4) 21 + 22 =     
5) 45 + 10 =     
6) 47 + 21 =     
7) 78 + 1 =     
8) 63 + 4 =     
9) 43 + 4 =     
10) 88 + 0 =     
Page 3 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2)

Section 4 of 5: Subtraction Within 100 (No Regrouping)
Name: ________________________________ Date: ____________________ Score: _________

Find the difference for each subtraction problem.

1) 27 - 11 =     
2) 42 - 11 =     
3) 91 - 20 =     
4) 75 - 14 =     
5) 59 - 33 =     
6) 98 - 30 =     
7) 83 - 63 =     
8) 32 - 11 =     
9) 66 - 20 =     
10) 54 - 14 =     
Page 4 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2)

Section 5 of 5: 100th Day Celebration Word Problems
Name: ________________________________ Date: ____________________ Score: _________

Read each word problem carefully. Show your work in the space provided, and write your final answer with its matching unit.

1.

Lucas collected stickers to decorate the 100th day of school banner. Lucas placed 37 star stickers and 25 smiley stickers on the banner. How many stickers did Lucas place in all?

Answer:
        
2.

For the 100th day collection table, Maya brought 29 red bottle caps and 35 blue bottle caps in a zipper bag. How many bottle caps did Maya bring altogether?

Answer:
        
3.

The classroom sorted crayons for the 100th day art celebration. Aiden counted 17 crayons in the supply basket and found 32 more crayons on the drawing table. How many crayons were counted in all?

Answer:
        
4.

Harper collected stickers to decorate the 100th day of school banner. Harper placed 21 star stickers and 35 smiley stickers on the banner. How many stickers did Harper place in all?

Answer:
        
5.

At recess on the 100th day of school, Maya took the 100-jump fitness challenge. Maya completed 35 jump rope skips in the morning and 45 more skips in the afternoon. How many skips did Maya finish in all?

Answer:
        
6.

The classroom sorted crayons for the 100th day art celebration. Caleb counted 28 crayons in the supply basket and found 19 more crayons on the drawing table. How many crayons were counted in all?

Answer:
        
Page 5 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2)

Section 5 of 5: 100th Day Celebration Word Problems
Name: ________________________________ Date: ____________________ Score: _________

Read each word problem carefully. Show your work in the space provided, and write your final answer with its matching unit.

7.

On the 100th day of school, Sam bundled crayons into groups of ten. Sam made 9 bundles with 10 crayons in each bundle. How many crayons are in those bundles altogether?

Answer:
        
8.

At recess on the 100th day of school, Liam took the 100-jump fitness challenge. Liam completed 46 jump rope skips in the morning and 40 more skips in the afternoon. How many skips did Liam finish in all?

Answer:
        
Page 6 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill ANSWER KEY Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2) — Answer Key

Section 1 of 5: Skip Counting to 100 by 5s & 10s on Number Lines — Answers

Answer key for Skip Counting to 100 by 5s & 10s on Number Lines (8 problems).

1. Missing number = ?
0 10 20 30 40 50 60 70 80 90
Missing number:
60
2. Missing number = ?
0 10 20 30 40 50 60 70 80 90
Missing number:
40
3. Missing number = ?
0 5 10 15 20 25 30
Missing number:
5
4. Missing number = ?
40 45 50 55 60 65 70 75 80 85
Missing number:
45
5. Missing number = ?
25 30 35 40 45 50 55 60
Missing number:
45
6. Missing number = ?
25 30 35 40 45 50 55 60
Missing number:
50
7. Missing number = ?
15 20 25 30 35 40 45 50 55 60 65
Missing number:
40
8. Missing number = ?
30 40 50 60 70 80 90 100
Missing number:
50
Answer Key — Page 1 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill ANSWER KEY Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2) — Answer Key

Section 2 of 5: Comparing Numbers to 100 (<, >, =) — Answers

Answer key for Comparing Numbers to 100 (<, >, =) (12 problems).

1)
79 > 48
2)
7 < 76
3)
22 < 52
4)
89 = 89
5)
13 > 3
6)
61 > 39
7)
52 > 15
8)
26 < 73
9)
68 > 39
10)
55 < 61
11)
26 > 22
12)
65 < 84
Answer Key — Page 2 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill ANSWER KEY Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2) — Answer Key

Section 3 of 5: Addition Within 100 (No Regrouping) — Answers

Answer key for Addition Within 100 (No Regrouping) (10 problems).

1) 45 + 21 = 66
2) 23 + 43 = 66
3) 18 + 0 = 18
4) 21 + 22 = 43
5) 45 + 10 = 55
6) 47 + 21 = 68
7) 78 + 1 = 79
8) 63 + 4 = 67
9) 43 + 4 = 47
10) 88 + 0 = 88
Answer Key — Page 3 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill ANSWER KEY Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2) — Answer Key

Section 4 of 5: Subtraction Within 100 (No Regrouping) — Answers

Answer key for Subtraction Within 100 (No Regrouping) (10 problems).

1) 27 - 11 = 16
2) 42 - 11 = 31
3) 91 - 20 = 71
4) 75 - 14 = 61
5) 59 - 33 = 26
6) 98 - 30 = 68
7) 83 - 63 = 20
8) 32 - 11 = 21
9) 66 - 20 = 46
10) 54 - 14 = 40
Answer Key — Page 4 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill ANSWER KEY Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2) — Answer Key

Section 5 of 5: 100th Day Celebration Word Problems — Answers

Answer key for 100th Day Celebration Word Problems (8 problems).

1.

Lucas collected stickers to decorate the 100th day of school banner. Lucas placed 37 star stickers and 25 smiley stickers on the banner. How many stickers did Lucas place in all?

Answer:
62 stickers
2.

For the 100th day collection table, Maya brought 29 red bottle caps and 35 blue bottle caps in a zipper bag. How many bottle caps did Maya bring altogether?

Answer:
64 bottle caps
3.

The classroom sorted crayons for the 100th day art celebration. Aiden counted 17 crayons in the supply basket and found 32 more crayons on the drawing table. How many crayons were counted in all?

Answer:
49 crayons
4.

Harper collected stickers to decorate the 100th day of school banner. Harper placed 21 star stickers and 35 smiley stickers on the banner. How many stickers did Harper place in all?

Answer:
56 stickers
5.

At recess on the 100th day of school, Maya took the 100-jump fitness challenge. Maya completed 35 jump rope skips in the morning and 45 more skips in the afternoon. How many skips did Maya finish in all?

Answer:
80 skips
6.

The classroom sorted crayons for the 100th day art celebration. Caleb counted 28 crayons in the supply basket and found 19 more crayons on the drawing table. How many crayons were counted in all?

Answer:
47 crayons
Answer Key — Page 5 of 6 Free printable math packs at Worksheet Mill Code: 0028T5
Worksheet Mill ANSWER KEY Pack Code: 0028T5

100th Day of School Math Pack (Grades 1–2) — Answer Key

Section 5 of 5: 100th Day Celebration Word Problems — Answers

Answer key for 100th Day Celebration Word Problems (8 problems).

7.

On the 100th day of school, Sam bundled crayons into groups of ten. Sam made 9 bundles with 10 crayons in each bundle. How many crayons are in those bundles altogether?

Answer:
90 crayons
8.

At recess on the 100th day of school, Liam took the 100-jump fitness challenge. Liam completed 46 jump rope skips in the morning and 40 more skips in the afternoon. How many skips did Liam finish in all?

Answer:
86 skips
Answer Key — Page 6 of 6 Free printable math packs at Worksheet Mill Code: 0028T5

Ways to Use This Pack

Sub Plans

Clear student sheets with complete answer keys ready for any substitute to run without prep.

Morning Work

The first ten minutes while attendance is taken and students settle into the room.

Homeschool Practice

Daily focused math time with zero screen distractions and clear answer keys for easy checking.

Homework

A clean, predictable practice sheet students can complete at home without adult coaching.

Weekly classroom routine: Use the skip counting and comparison sheets for morning warm-ups during the week of the 100th day. Save the addition, subtraction, and word-problem sections for partner stations or small-group rotations.

Pack Contents & Skill Breakdown

5 Sections • 48 Total Problems

Every section is generated from our verified procedural math engines with dedicated problem formatting. If you want to customize an individual section's factor ranges, digit counts, or problem volume, explore the dedicated generator tool linked below.

Section Topic & Underlying Generator Preset Level Problems Full Tool
Section 1 Skip Counting to 100 by 5s & 10s on Number Lines place-value Standard 8 Customize →
Section 2 Comparing Numbers to 100 (<, >, =) place-value Easy 12 Customize →
Section 3 Addition Within 100 (No Regrouping) addition Easy 10 Customize →
Section 4 Subtraction Within 100 (No Regrouping) subtraction Easy 10 Customize →
Section 5 100th Day Celebration Word Problems word-problems Easy 8 Customize →

Classroom & Home Practice Routines

Classroom Implementation

Use the skip counting and comparison sheets for morning warm-ups during the week of the 100th day. Save the addition, subtraction, and word-problem sections for partner stations or small-group rotations.

Home & Homework Strategy

Work through one section per evening leading up to the 100th day milestone. Encourage your child to read the word problems aloud and explain their thinking step by step.

Frequently Asked Questions

What math standards are covered in this 100th Day pack?

This pack aligns with early elementary standards covering skip counting by 5s and 10s (2.NBT.A.2), number comparison using inequality symbols (1.NBT.B.3, 2.NBT.A.4), two-digit addition and subtraction within 100 without regrouping (1.NBT.C.4, 2.NBT.B.5), and contextual word problems.

Why are both addition and subtraction included in this pack?

By late January, 1st and 2nd graders are expected to transition smoothly between finding sums and differences within 100. Providing both operations ensures balanced review of the inverse relationship between addition and subtraction.

Can these worksheets be printed on standard Letter and A4 paper?

Yes. Every page in this pack is engineered to fit cleanly on both Letter and A4 paper formats with verified zero-margin clipping and zero problem splits across page breaks.

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