Unit 2 Math Review

Find the product mentally
70 X 300

• 21,000
• 2,100
• 210
• 210,000

Tags

CCSS.5.NBT.B.5

Find the product mentally:
21 X 100

• 2,100
• 210
• 21,000
• 21

Tags

CCSS.5.NBT.B.5

Find the product mentally:
8 X 500

• 4,000
• 40
• 400
• 40,000

Tags

CCSS.4.NBT.B.5

Find the product mentally:
6 X 10⁴

• 60,000
• 6,000
• 600,000
• 600

Tags

CCSS.5.NBT.A.2

Estimate using rounding or using compatible numbers:
63 X 51

• 3,000
• 5,000
• 4,000
• 30,000

Tags

CCSS.4.NBT.B.5

Estimate by rounding or using compatible numbers:
7 X 89

• 630
• 800
• 1,200
• 1,100

Tags

CCSS.4.NBT.B.5

Estimate by rounding or using compatible numbers:
9 X 31

• 270
• 400
• 570
• 600

Tags

CCSS.4.NBT.B.5

Estimate by rounding or using compatible numbers:
18 X 91

• 2,000
• 4,000
• 6,000
• 8,000

Tags

CCSS.4.NBT.B.5

Multiply.
36 X 77

• 2,772
• 3,775
• 4,654
• 1,772

Tags

CCSS.4.NBT.B.5

Multiply.
124 X 9

• 1,116
• 2,116
• 4,116
• 1,216

Tags

CCSS.4.NBT.B.5