Estimation of Multiplying Decimals

Estimate this equation: 1.4 x 5

Choose the closest estimation of the product below.

• between 5 and 10

• less than 5

• more than 8

• between 2 and 7

Solve 15 x 0.04.

• 6

• 0.6

• 60

• 0.06

Rate yourself on how confident you feel about multiplying a decimal by a whole number?

• I am so confident I could teach someone else how to do this.

• I feel confident enough to complete any question given me and explain my thinking.

• I am starting to understand it. I might still need some help occasionally.

• I am struggling to understand this concept. I still need to practice it.

Based on your estimation where would you place the decimal for the product of 5 x 6.7
Hint: round 6.7

• 335

• 33.5

• 3350

• 3.35

0.2 x 0.8

• 16

• 0.16

• 0.016

• 1.6

9.4 x 8.6

Mathematical Equivalence

ON

Based on your estimation where would you place the decimal for the product of 8 x 9.2

• 73.6

• 736

• 7.36

• 0.736

Based on your estimation where would you place the decimal for the product of 4.2 x 7

• 2.94

• 2940

• 294

• 29.4

Based on your estimation where would you place the decimal for the product of 7.8 x 3

• 15

• 234

• 23.4

• 150

Based on your estimation where would you place the decimal for the product of 9 x 7.1

• 63.9

• 639

• 6.39

• 6390