Estimation and Computation

There are 26 kids in George's class. Rounding to the nearest tens, about how many kids are there in George's class?

• 30

• 25

• 20

• 40

Kayleigh has 14 cousins. Rounding to the nearest ten, about how many cousins does Kayleigh have?

• 10

• 20

• 15

Round 89 to the nearest ten.

• 90

• 80

• 100

Round 87 to the nearest ten. 

• 90

• 80

• 100

Round 92 to the nearest ten. 

• 90

• 80

• 100

Round 18 to the nearest ten. 

• 20

• 10

• 30

Amy had 13 jelly beans in her left hand and 28 in her right hand. Estimate how many jelly beans Amy had in all.

• 45

• 40

• 50

• 30

Bobby has 44 toy cars and trucks. He also has 62 ninja turtles and soldiers. Estimate how many toy cars, trucks, ninja turtles and soldiers Bobby has.

• 86

• 10

• 100

Round to the nearest ten, then estimate:
27 + 78

• 115

• 90

• 100

• 110

Estimating is to....

• find the exact answer

• find something close to the correct answer

• use an algorithm