Adding and Subtracting Decimals

Front

What is the sum of 7 and 2.3?

Back

9.3 or 9.30

Front

How do you add decimals?

Back

Align the decimal points and add as you would whole numbers, then place the decimal point in the sum.

Front

What is 0.29 + 0.58?

Back

0.87 or .87

Front

How do you subtract decimals?

Back

Align the decimal points and subtract as you would whole numbers, then place the decimal point in the difference.

Front

What is 91.49 - 0.7?

Back

90.79

Front

If Chicago was predicted to receive 1.254 inches of rain and actually received 0.875 inches, how do you find the difference?

Back

Subtract the actual amount from the predicted amount: 1.254 - 0.875 = 0.379 inches.

Front

What is 7.148 - 0.07?

Back

7.078

Front

Why is it important to align decimal points when adding or subtracting?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.

Front

What is the definition of a decimal?

Back

A decimal is a fraction expressed in a special form, where the denominator is a power of ten.

Front

What is the place value of the digit 3 in the number 2.345?

Back

The place value of 3 is in the tenths place.