decimals - all 4 operations

What is the most important step when adding or subtracting decimals?

• Rounding to the nearest whole number.

• Lining up the decimal points.

• Ignoring the decimal points until the end.

• Using a calculator.

When adding 18.4 and 3.97, why is a placeholder zero added to 18.4 to make it 18.40?

• To make the numbers larger.

• To ensure all numbers have the same number of decimal places for easier alignment.

• To change the value of the number.

• To make the sum an even number.

When subtracting 4.864 from 34.6, what must be done before performing the subtraction?

• Round both numbers to the nearest tenth.

• Add placeholder zeros to 34.6 to match the number of decimal places in 4.864.

• Ignore the decimal points and subtract as whole numbers.

• Convert both numbers to fractions.