Page 221 - L4-9 Multiply 2-Digit by 2-Digit Numbers

Front

What is the product of 38 and 41?

Back

1558

Front

What is the product of 17 and 21?

Back

357

Front

What is the product of 18 and 42?

Back

756

Front

What is the product of 27 and 12?

Back

324

Front

What is the product of 53 and 17?

Back

901

Front

What does it mean to multiply two numbers?

Back

To multiply two numbers means to find the total of one number added to itself a certain number of times, as indicated by the other number.

Front

What is a 2-digit number?

Back

A 2-digit number is a number that has two digits, ranging from 10 to 99.

Front

What is the multiplication algorithm for 2-digit by 2-digit numbers?

Back

1. Multiply the ones place of the bottom number by the top number. 2. Multiply the tens place of the bottom number by the top number, shifting one place to the left. 3. Add the results.

Front

What is the commutative property of multiplication?

Back

The commutative property states that changing the order of the numbers you are multiplying does not change the product. For example, 3 x 4 = 4 x 3.

Front

What is the associative property of multiplication?

Back

The associative property states that when multiplying three or more numbers, the way in which the numbers are grouped does not change the product. For example, (2 x 3) x 4 = 2 x (3 x 4).