Decimals · Grade 4
In Grade 4 you learn: tenths and hundredths.
Decimals carry place value past the decimal point into tenths, hundredths and thousandths. Money, measurements and calculator answers are all written as decimals, so reading, ordering and calculating with them is an everyday skill.
Key facts
- To compare decimals, line up the points and compare digit by digit (fill gaps with zeros): 0.5 > 0.45.
- To add or subtract, line up the decimal points.
- × 10 moves the digits 1 place left, × 100 moves them 2 places and × 1,000 moves them 3. ÷ moves them right.
Worked examples
Example 1
Work out 12 − 4.37.
Answer: 7.63
Example 2
A 2.4 m plank is cut into pieces 0.15 m long. How many pieces are there?
Answer: 16