Decimal Addition and Subtraction

Front

What is the sum represented in the model?

Back

0.16

Front

What is the first step when adding and subtracting decimals?

Back

Line up the decimals

Front

Round each decimal to the nearest whole number. Then add: 3.872 + 2.409

Back

6

Front

Estimate the difference by rounding each decimal to the nearest hundred: 376.8 - 109.5

Back

300

Front

Find the sum: 9 + 12.36 = ?

Back

21.36

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (.) to separate the whole number from the fractional part.

Front

How do you add decimals?

Back

Line up the decimal points and add as you would whole numbers, placing the decimal point in the answer directly below the other decimal points.

Front

What is the difference between addition and subtraction of decimals?

Back

Addition combines values, while subtraction finds the difference between values.

Front

What does it mean to round a decimal?

Back

Rounding a decimal means adjusting its value to make it simpler while keeping it close to the original value.

Front

How do you round 2.7 to the nearest whole number?

Back

2.7 rounds to 3.