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 divide a whole number by a decimal?

Back

To divide a whole number by a decimal, you can multiply both the dividend (the whole number) and the divisor (the decimal) by the same power of 10 to eliminate the decimal. Then, perform the division as usual.

Front

What is the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length by its width. The formula is: Area = Length × Width.

Front

Estimate the cost of 3 shirts at $16.89 each and 2 belts at $8.97 each. How much more money does Paula need if she has $45?

Back

Paula needs approximately $24 more to buy the shirts and belts.

Front

What is the result of 228 ÷ 0.03?

Back

The result is 7,600.

Front

How many full pieces can you cut from a string cheese that is 6 inches long into pieces that are 0.32 inches long?

Back

You can cut 18 full pieces.

Front

What is 24.5 ÷ 3.5?

Back

The result is 7.

Front

What is the first step in multiplying decimals?

Back

The first step is to ignore the decimal points and multiply the numbers as if they were whole numbers.

Front

How do you place the decimal point in the product of decimal multiplication?

Back

Count the total number of decimal places in both factors. The decimal point in the product should be placed to the left by that total number of places.

Front

What is a good strategy for estimating sums and differences?

Back

Rounding numbers to the nearest whole number or to a convenient value can help in estimating sums and differences.