Multiplication Review

46 x 5

Tags

CCSS.4.NBT.B.5

What would be your best estimate for 152 x 4?

• 300

• 600

• 250

• 750

Answer explanation

You would round 152 to 150. 150 x 4 would be 600.

To get the exact answer, you would simply add 8 (2x4) because we rounded down by 2, 4 times.

Tags

CCSS.4.NBT.B.5

Estimate 32 x 4

• 70

• 30

• 120

• 140

Answer explanation

Round 32 to 30

30 x 4 = 120

To get the exact answer, you would add back 2 x 4 = 8

Exact product is 128

Tags

CCSS.4.NBT.B.5

52 x 4

Tags

CCSS.4.NBT.B.5

Show me 340 x 5

Tags

CCSS.4.NBT.B.5

456 x 4

• 1824

• 1456

• 673

• 1270

Tags

CCSS.4.NBT.B.5

72 x 8

Answer explanation

Tags

CCSS.4.NBT.B.5

639 x 6

Answer explanation

639

x 6

54 6 x 9

+ 180 6 x 30

3600 6 x 600

3834

Tags

CCSS.4.NBT.B.5

Find the answer for 63 x 9

Next, think of how you would estimate this answer to check your work. We will discuss this one together.

Answer explanation

63

x 9

27 9 x 3

540 9 x 60

567

Tags

CCSS.4.NBT.B.5

How confident are you when it comes to multiplication?

• Great! I'm ready to move on.

• Good, but it takes me a little time. I need a little more practice.

• I kind of get it. I need more practice though.

• I don't feel like I can do it. I need a lot of practice.

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C