4th Reteach 4-10

​

Multiple Choice

Using rounding, what would we round 31 to?

• 30

• 35

• 40

• 45

​30

Multiple Choice

Using rounding, what would we round 79 to?

• 75

• 80

• 70

• 85

​30

80

Multiple Choice

30 x 80 = ?

• 24

• 240

• 2400

• 24,000

​30

80

2,400

​

​

​2

1

6

1

​

​2

1

6

1

1

1

3

8

0

​2

1

6

1

1

1

3

8

0

​2

1

6

1

1

1

3

8

0

1

5

4

1

​

​

​

​20

​

​20

70

Multiple Choice

70 x 20 =

• 14

• 140

• 1,400

• 14,000

​20

70

1,400

1,541

1,400

​Is this answer reasonable?

​

​

​

​6,132

​

​6,132

​1,083

​

​6,132

​1,083

2,688

​6,132

​1,083

2,688

​6,132

​1,083

2,688

2,046