Grade 5 · Math · Unit 7 of 13
Decimals
Tenths, hundredths and thousandths
What your child practises
Reading, writing, comparing and rounding decimals to thousandths, linking decimals to fractions out of 10, 100 and 1000, and adding and subtracting decimals in real situations.
Prince Edward Island Curriculum curriculum outcome: N8; N9; N10; N11 · tenths, hundredths and thousandths, comparing decimals and adding and subtracting them
How we explain it
Children can open this short lesson before they practise.
- Places after the point are tenths, hundredths, thousandths.
- To add or subtract, line up the decimal points.
- Fill empty places with zeros so the numbers match.
Example: 5.5 + 5.25 = ? Write 5.5 as 5.50. 5.50 + 5.25 = 10.75. Answer: 10.75
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Put these decimals in order from least to greatest.
- 0.6
- 0.607
- 0.76
- 0.67
0.6 → 0.607 → 0.67 → 0.76
Hint: Compare place by place: tenths first, then hundredths, then thousandths. Writing zeros on the end (0.5 = 0.500) can help.
Question 2
Maya's recipe uses 9.36 kg of flour and 1.1 kg of sugar. What is the total mass?
9.36 + 1.1 = ?
answer boxkg
10.46 kg
Hint: Line up the decimal points. Write zeros so both numbers have the same number of decimal places, then add as with whole numbers.
Question 3
Round 7.981 to the nearest tenth.
- 8.0
- 8
- 7.98
- 7.9
8.0
Hint: Look at the digit just to the right of the tenths place. If it is 5 or more, round up; if it is less than 5, round down.
Question 4
Jay's pumpkin has a mass of 6.5 kg. A friend's pumpkin is 2.42 kg. How much heavier is Jay's pumpkin?
6.5 − 2.42 = ?
answer boxkg
4.08 kg
Hint: Line up the decimal points and write zeros in any empty places (for example, 2 = 2.000). Then subtract, regrouping as needed.
Question 5
Write 771/1000 as a decimal.
771/1000 = ?
answer box
0.771
Hint: The denominator tells you the last place: 10 → tenths, 100 → hundredths, 1000 → thousandths. Use zeros to fill any empty places.
Question 6
Write this as a decimal: fourteen and seven hundred eight thousandths.
answer box
14.708
Hint: The word “and” marks the decimal point. The last word tells you the last place: tenths = 1 digit after the point, hundredths = 2, thousandths = 3. Use zeros to hold empty places.