Estimating with Multiplying 2-Digit by 2-Digit

Front

What is estimating in multiplication?

Back

Estimating in multiplication is the process of finding a close approximation of the product of two numbers, rather than calculating the exact answer.

Tags

CCSS.4.NBT.B.5

Front

Estimate 31 x 52.

Back

1,500

Tags

CCSS.4.NBT.B.5

Front

Estimate 27 x 42.

Back

1,200

Tags

CCSS.4.NBT.B.5

Front

What are compatible numbers?

Back

Compatible numbers are numbers that are easy to compute with mentally, often rounded to make calculations simpler.

Front

Use compatible numbers to estimate 71 x 14.

Back

70 x 15

Tags

CCSS.4.NBT.B.5

Front

True or False: Estimating gives you the exact answer to a problem.

Back

False

Front

How would you estimate 53 x 72?

Back

50 x 70

Tags

CCSS.4.NBT.B.5

Front

What is the purpose of estimating in math?

Back

The purpose of estimating is to quickly assess the size of a number or the result of a calculation without needing to perform exact calculations.

Front

Estimate 45 x 36.

Back

1,600

Tags

CCSS.4.NBT.B.5

Front

What is rounding in the context of estimation?

Back

Rounding is adjusting a number to the nearest ten, hundred, etc., to make it easier to work with.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3