Add and Subtract Decimals with Rounding and Estimation

Round each decimal to the nearest whole number. Then add or subtract.

9.086 - 2.419

Which of the following is the best estimate for the equation:

70.2-59.7

• 25

• 10

• 3

• 19

Which of the following is the best estimate for the equation:

15.9 + 12.03

• 28

• 15

• 37

• 18

Which of the following is the best estimate for the equation: 61.44 + 88.3

• 100

• 120

• 150

• 200

Chance has two numbers 2.376 and 0.122.
What is the sum of both the numbers?

​ ​ ​ (a)  

What is the difference of both the numbers?

​ ​ (b)  

• 2.498

• 3.498

• 1.498

• 2.254

• 1.456

• 0.876

• 1.75

Kyle has two numbers 2.376 and 0.122.
What is the sum of both the numbers?

​ ​ ​ (a)  

What is the difference of both the numbers?

​ ​ (b)  

• 2.498

• 3.498

• 1.498

• 2.254

• 1.456

• 0.876

• 1.75

Keegan had $11 after he left the candy store. If he bought candy for $6.39, ABOUT how much money did he have before he went into the store?

• $17

• $14.9

• $8.23

• $4.13