Review for Eureka Math Module #2

Front

Estimate the quotient: 562 ÷ 73

Back

First, turn 73 into 70. Then change 562 into 560 because 7 X 8 is 56. The estimate is about 8.

Front

What is the mistake in saying 19 ÷ 9 equals 9 ÷ 4 because both are '2 R1'?

Back

The mistake is that 19 ÷ 9 is approximately 2.11, while 9 ÷ 4 is 2.25. They are not equal.

Front

Estimate the product: 47 × 68

Back

Round 47 to 50 and 68 to 70. The estimate is 50 × 70 = 3,500.

Front

Estimate 1,475 ÷ 688 by rounding 688 to 700. What do you round 1,475 to?

Back

1,475 rounds to 1,400.

Front

Is 5,350 ÷ 10 = 5.35 true or false?

Back

False. 5,350 ÷ 10 = 535.

Front

What is rounding in mathematics?

Back

Rounding is the process of adjusting a number to a nearby value that is simpler and easier to work with.

Front

How do you round 47 to the nearest ten?

Back

47 rounds to 50 because it is closer to 50 than to 40.

Front

What is the purpose of estimating in division?

Back

Estimating helps to quickly find an approximate answer without calculating the exact quotient.

Front

What does 'R' mean in division?

Back

'R' stands for 'remainder', which is the amount left over after division.

Front

How do you estimate the product of two numbers?

Back

Round each number to the nearest ten and then multiply the rounded numbers.