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Add Within 100: Set 9 worksheet preview

Worksheet

Add Within 100: Set 9

Grade 1 practice adding a one-digit number or a multiple of ten to a two-digit number within 100.

Grade 1MathInteractive · Printable

Aligned to1.NBT.C.4

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 14 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 1
Subject
Math
Question types
Fill in the blank

About this worksheet

What students practice

  • Students add a one-digit number to a two-digit number within 100.
  • Students add a multiple of ten to a two-digit number.

How to use

Remind students to add tens to tens and ones to ones; the base-ten blocks in the last section can be counted.

Curriculum

Common Core standard covered

1.NBT.C.4

Add within 100 using models and place-value strategies, including adding tens and ones.

Preview

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Name Date

Add Within 100: Set 9

Add ones and tens to two-digit numbers.

Add ones

Write each sum.

1.

25 + 8 =  

2.

21 + 8 =  

3.

67 + 7 =  

4.

31 + 9 =  

5.

20 + 6 =  

6.

65 + 6 =  

Add tens

Write each sum.

7.

32 + 60 =  

8.

32 + 50 =  

9.

61 + 20 =  

10.

52 + 40 =  

11.

79 + 10 =  

Use the blocks

Write each sum.

12.
Use the blocks to help you add.


71 + 2 =  

13.
Use the blocks to help you add.


57 + 4 =  

14.
Use the blocks to help you add.


14 + 8 =  

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