Multiplying Rational Numbers with Decimals

What is the first step in multiplying rational numbers?

• Line up the decimals

• Estimate the product

• Use Math Bear to determine the sign

• Multiply the numbers directly

Tags

CCSS.7.NS.A.2A

When multiplying -6.5 by 2, what is the sign of the result?

• Positive

• Negative

• Zero

• Undefined

Tags

CCSS.7.NS.A.2A

In the example of -6.5 * 2, what is the final answer?

• -13

• 12

• 13

• -12

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the sign of the product when multiplying -3.15 by -2.4?

• Positive

• Negative

• Zero

• Undefined

Tags

CCSS.7.NS.A.2A

How many decimal places should be in the answer for -3.15 * -2.4?

• 2

• 1

• 3

• 4

Tags

CCSS.7.NS.A.2A

What is the final answer for -3.15 * -2.4?

• 7.56

• -7.560

• -7.56

• 7.560

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

When multiplying -6, -2.1, and -3.4, what is the sign of the final product?

• Negative

• Undefined

• Positive

• Zero

Tags

CCSS.7.NS.A.2A

What is the estimated product of 12.6 and 3.4?

• 42

• 45

• 39

• 36

Tags

CCSS.5.NBT.B.7

How many decimal places should be in the final answer for 12.6 * 3.4?

• 3

• 1

• 2

• 4

Tags

CCSS.6.NS.B.3

What is the final answer for 12.6 * -3.4?

• 39.84

• -39.84

• -42.84

• 42.84

Tags

CCSS.7.NS.A.2A