Chapter 2 Add and subtract whole numbers and money

1. Which property can explain N+0=N?

• Commutative property of addition

• Associative property of addition

• Zero property of addition

• Identity property of addition

Use breaking apart skill to calculate 4,440+160

• 4,400+(60+100)

• 4,440+(140+20)

• 4,440+(100+60)

• 4,400+(40+120)

Use compensation skill to calculate 171-47

• 171-40-7

• 171-50-3

• 171-41-6

• 171-50+3

Add 1,385+8,650.Rounding to the nearest hundreds, then calculate.

• 10,000

• 10,100

• 9,000

• 9,900

Please underestimate the difference of 809-166

• 643

• 700

• 650

• 600

Add $365.24 +$134.81

• 500,05

• $499.05

• $500.05

• 400,05

Find 5,096+565+9,145=

Find 4,000-2,780=

What is the next number after 51

Write a number expression for the phrase: 231 decreased by 141

• 231-141

• 141-231

• 231+141

• 141+231