Multiplication Estimation

Front

What is multiplication estimation?

Back

Multiplication estimation is a method used to find an approximate product of two numbers by rounding them to easier numbers before multiplying.

Front

How do you estimate the product of two numbers?

Back

To estimate the product, round each number to the nearest ten or hundred, then multiply the rounded numbers.

Front

What is the estimated product of 32 x 45?

Back

First, round 32 to 30 and 45 to 50. Then, 30 x 50 = 1500.

Front

What is the best estimate for 89 x 8?

Back

Round 89 to 90. Then, 90 x 8 = 720, so the best estimate is 700.

Front

How do you find the quotient of a division problem using estimation?

Back

To estimate the quotient, round the dividend and divisor to the nearest ten or hundred, then divide the rounded numbers.

Front

What is the estimated quotient of 676 ÷ 4?

Back

Round 676 to 680 and 4 to 4. Then, 680 ÷ 4 = 170.

Front

Which product is between 900 and 1,000?

Back

Estimate by rounding: 89 x 11 is approximately 900, which is between 900 and 1,000.

Front

What is the product of 12 x 45?

Back

12 x 45 = 540, which is the exact product.

Front

What is the importance of rounding in multiplication estimation?

Back

Rounding simplifies calculations, making it easier to quickly find approximate answers.

Front

What are factors in multiplication?

Back

Factors are numbers that are multiplied together to get a product.