Unit 1

Basic Level

Unit 1 Basic Worksheet

Practice two-digit addition and subtraction with and without regrouping

20 Questions•25-30 minutes

Instructions

Read each question carefully before answering
Take your time to think through each problem
You can change your answers before submitting
Click "Submit Answers" to see your results
Use hints if you need help understanding a question

Question 1

Multiple Choice

What is 23 + 45?

Question 2

Fill In Blank

36 + 21 = ___

💡 Hint

Add tens and ones separately.

Question 3

Multiple Choice

Do you need to regroup for 28 + 19?

Question 4

Fill In Blank

49 + 28 = ___

💡 Hint

Don't forget to regroup!

Question 5

Multiple Choice

What is 87 - 32?

Question 6

True False

For 68 - 25, we don't need to regroup.

Question 7

Fill In Blank

52 - 27 = ___

💡 Hint

You'll need to borrow!

Question 8

Multiple Choice

Emma has 34 pencils. She buys 28 more. How many pencils does she have now?

Question 9

Fill In Blank

Break apart 57 into tens and ones: 57 = ___ + 7

💡 Hint

How many tens are in 57?

Question 10

Multiple Choice

Which problem needs regrouping for addition?

Question 11

True False

When we regroup in addition, we trade 10 ones for 1 ten.

Question 12

Fill In Blank

73 - 45 = ___

💡 Hint

Remember to regroup first!

Question 13

Multiple Choice

A library has 85 books. 39 books are checked out. How many books are left?

Question 14

Fill In Blank

19 + 17 = ___

💡 Hint

Both ones digits add to 16!

Question 15

True False

For 90 - 47, we need to regroup.

Question 16

Multiple Choice

What is 56 + 36?

Question 17

Fill In Blank

64 - 28 = ___

💡 Hint

Can't take 8 from 4, so borrow!

Question 18

Multiple Choice

Which shows the correct regrouping for 53 - 28?

Question 19

True False

In vertical addition, we always start adding from the ones place.

Question 20

Fill In Blank

45 + 45 = ___

💡 Hint

Double 45 equals?

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