Expanded Form
Add and Subtract 10 and 100
Subtraction with Regrouping
Missing Numbers in Addition Problems
Two-Step Story Problems
100

Write the expanded form: 395

300 + 90 + 5

100

Add 10 to the number: 1,783

1,793

100

 53

-29

14

100

1 + ____ = 6

5

100

Adelyn picked 15 apples, and then picked 20 more. She ate 10 of the apples. How many apples does she have left?

15 + 20 = 35

35 - 10 = 25

200

Write the expanded form: 732

700 + 30 + 2

200
Subtract 10 from the number: 3,679

3,669

200

 65

-58

7

200

5 + ____ = 9

4

200

There were 20 crayons in a box. Liam used 8 crayons, and Hudson gave him 4 more crayons. How many crayons are in the box now?

20 - 8 = 12

12 + 4 = 16

300

Write the expanded form: 1,618

1,000 + 600 + 10 + 8

300

Add 100 to the number: 512

612

300
 64

-28

26

300

8 + ____ = 15

7

300

There were 20 balloons at the party. 12 balloons popped, and then 9 balloons were added. How many balloons are there now?

20 - 12 = 8

8 + 9 = 17

400

Write the expanded form: 3,987

3,000 + 900 + 80 + 7

400

Add 100 to the number: 1,468

1,568

400

 86

-59

27

400

9 + ____ = 18

9
400

There were 10 pencils in a desk. Eleanor lost 3 pencils, and Ms. Riley gave her 4 more pencils. How many pencils are in the desk now?

10 - 3 = 7

7 + 4 = 11

500

Write the expanded form: 5,301

5,000 + 300 + 0 + 1

500

Subtract 100 from the number: 13,520

13,420

500

 74

-59 

15

500

____ + 5 = 17

12

500

There were a dozen eggs in the box. Milo took 9 of the eggs, and Sam put 5 new eggs into the box. How many eggs are in the box now?

12 - 9 = 3

3 + 5 = 8

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