Mastering Multiplying Decimals with Partial Products

Why is it important to estimate the result before solving a multiplication problem?

• To practice mental math

• To avoid using decimals

• To check if the final answer is reasonable

• To make the problem easier to solve

What is the first step in the box method for multiplying decimals?

• Writing the numbers in expanded notation

• Multiplying the whole numbers

• Drawing the box

• Estimating the result

Tags

CCSS.6.NS.B.3

In the example 1.2 x 3.4, what is the product of 3 times 0.2?

• 0.6

• 6

• 0.02

• 0.06

Tags

CCSS.5.NBT.B.7

When multiplying 4.5 by 6.7, what is the estimated result?

• 30

• 45

• 35

• 40

Tags

CCSS.5.NBT.B.7

In the box method, what does 6 times 0.5 equal?

• 3

• 0.3

• 0.03

• 30

Tags

CCSS.6.NS.B.3

Why might it be helpful to temporarily ignore decimals when multiplying?

• To practice whole number multiplication

• To avoid mistakes

• To make the multiplication easier

• To simplify the addition step

Tags

CCSS.5.NBT.B.7

How do you determine where to place the decimal point after multiplying?

• By checking the nearest whole number

• By guessing

• By estimating the result

• By counting the total number of decimal places in the factors

Tags

CCSS.6.NS.B.3

In the problem 1.3 x 4.6, what is the product of 40 times 3?

• 1.2

• 12

• 120

• 0.12

Tags

CCSS.6.NS.B.3

What is the estimated result for 3.9 x 12.25?

• 40

• 45

• 48

• 50

Tags

CCSS.5.NBT.B.7

In the problem 3.9 x 12.25, what is the product of 30 times 1000?

• 3000

• 30000

• 300

• 300000

Tags

CCSS.5.NBT.A.2