Math Ch 2 - Grp 1

493 + 207 = _________

*Show your work!

Use mental math to subtract.

545 - 335 = ____________

Find the unknown.

78 + 34 = _______

*Show your work!

Find the unknown.

123 + ______ = 175

*Show your work!

Find the unknown.

(26+32) + _____ = 127

*Show your work!

Complete the number sentence.

76,912 + ________ = 77,912

Complete the number sentence.

124,567 + 100 = ______

Which equation represents the IDENTITY Property of Addition?

• (4 + 3) + 5 = 4 + (3 + 5)

• 4 + 0 = 4

• 8 - 0 = 8

• 5 + 2 = 2 + 5

Which equation represents the COMMUTATIVE Property?

• 6 + 3 = 6 + 3

• 0 + 7 = 7

• 3 - 3 = 0

• 2 + (5 + 9) = (2 + 5) + 9

Round to the nearest HUNDRED to ESTIMATE the sum of

1,245 + 482

*Show your work!