Addition and Subtraction within 1,000

Solve for the unknown below. 62 + 23 = _____

• 85

• 75

• 90

• 80

Solve for the unknown below. 50 - 10 = _____

• 40

• 30

• 45

• 60

What is addition?

• The combination of numbers, putting numbers together.

• The decomposition of numbers, taking numbers apart.

What is subtraction?

• The combination of numbers, putting numbers together.

• The decomposition of numbers, taking numbers apart.

Solve.

48 + 31 = ___

• 79

• 77

• 81

• 69

Level 2 Solve. Be ready to explain how you solved each problem. 38 + 25 = ___

• 63

• 53

• 65

• 60

Level 2 Solve. Be ready to explain how you solved each problem. 55 - 14 = ___

• 41

• 39

• 43

• 40

Level 2 Solve. Be ready to explain how you solved each problem. 71 - 45 = ___

• 26

• 36

• 16

• 28

Level 3 Solve for the unknown using a strategy or algorithm. Be ready to explain how you solved each problem. 663 + 224 = ____

• 887

• 877

• 897

• 779

Solve for the unknown using a strategy or algorithm. Be ready to explain how you solved each problem 684+256=?.

• 940

• 850

• 1020

• 765