5.3E, 5.3G Decimal Multiplication and Division

Front

What is decimal multiplication?

Back

Decimal multiplication is the process of multiplying numbers that have decimal points. It involves aligning the numbers, ignoring the decimal points during multiplication, and then placing the decimal point in the product based on the total number of decimal places in the factors.

Front

How do you multiply a decimal by a whole number?

Back

To multiply a decimal by a whole number, multiply as if there is no decimal, then place the decimal point in the product. The decimal point is placed so that the number of decimal places in the product equals the number of decimal places in the decimal being multiplied.

Front

What is the product of 32.4 and 1.6?

Back

51.84

Front

What is decimal division?

Back

Decimal division is the process of dividing numbers that have decimal points. It involves moving the decimal point in the divisor to make it a whole number and adjusting the dividend accordingly.

Front

How do you divide a decimal by a whole number?

Back

To divide a decimal by a whole number, divide as if there is no decimal, then place the decimal point in the quotient directly above the decimal point in the dividend.

Front

What is the quotient of 95.20 divided by 17?

Back

5.60

Front

How do you find the average time spent per day if given total time and number of days?

Back

To find the average time spent per day, divide the total time by the number of days. For example, if the total time is 182.6 minutes over 22 days, the average is 182.6 ÷ 22 = 8.3 minutes.

Front

What is the product of 0.45 and 0.2?

Back

0.09

Front

How do you calculate the total amount needed if each student receives a certain amount?

Back

To calculate the total amount needed, multiply the number of students by the amount each student receives. For example, if there are 87 students and each receives 3.5 pieces of paper, the total is 87 x 3.5 = 304.5 pieces.

Front

What is the importance of aligning decimal points in multiplication?

Back

Aligning decimal points ensures that the multiplication is done correctly, and it helps in placing the decimal point in the final product accurately.