6.4 Multiplying 3- and 4-Digit by 1-Digit Numbers

Front

What is multiplication?

Back

Multiplication is a mathematical operation where a number is added to itself a certain number of times. For example, 3 x 4 means adding 3 four times (3 + 3 + 3 + 3).

Front

What does it mean to estimate a product?

Back

Estimating a product means finding a rough answer that is close to the actual product, often by rounding the numbers before multiplying.

Front

How do you multiply a 3-digit number by a 1-digit number?

Back

To multiply a 3-digit number by a 1-digit number, multiply each digit of the 3-digit number by the 1-digit number, starting from the rightmost digit, and carry over if necessary.

Front

What is the product of 2,117 and 7?

Back

The product of 2,117 and 7 is 14,819.

Front

What is the product of 2,768 and 7?

Back

The product of 2,768 and 7 is 19,376.

Front

What is the product of 385 and 4?

Back

The product of 385 and 4 is 1,540.

Front

What is the product of 3,521 and 4?

Back

The product of 3,521 and 4 is 14,084.

Front

What is the product of 517 and 6?

Back

The product of 517 and 6 is 3,102.

Front

What is the importance of checking reasonableness in multiplication?

Back

Checking reasonableness helps to ensure that the answer is logical and within a reasonable range, which can help catch mistakes.

Front

What is a 4-digit number?

Back

A 4-digit number is a number that has four digits, ranging from 1,000 to 9,999.