Decimals

Number

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Work out $3.6 + 1.45$.

2 marks
Work out $7.2 - 2.85$.

2 marks
Work out $0.4 \times 0.35$.

3 marks
Work out $6.3 \div 0.09$.

3 marks
Write $\dfrac{7}{8}$ as a decimal. Then work out $4.2 \times \dfrac{7}{8}$.

4 marks
A plank is $2.4$ m long. Maya cuts off three pieces of $0.65$ m. How much of the plank is left?

4 marks
Pens cost £$1.35$ each and rulers cost £$0.85$ each. Sam buys $4$ pens and $2$ rulers. He pays with a £$10$ note. How much change does he get?

5 marks
Ribbon costs £$1.60$ per metre and tape costs £$0.90$ per metre. Nia needs $2.5$ m of ribbon and $3.5$ m of tape. A voucher takes £$1.25$ off the total. How much does she pay?

6 marks

Mark scheme

Answer. $5.05$
- Line the decimal points up.
- $3.60 + 1.45 = 5.05$
Answer. $4.35$
- $7.20 - 2.85$
- $4.35$
Answer. $0.14$
- $4 \times 35 = 140$
- Three digits after the decimal point in the question, so $0.140$.
- $0.14$
Answer. $70$
- $6.3 \div 0.09 = 630 \div 9$
- $630 \div 9 = 70$
Answer. $0.875$ and $3.675$
- $7 \div 8 = 0.875$
- $4.2 \times 7 = 29.4$
- $29.4 \div 8 = 3.675$
Answer. $0.45$ m
- $3 \times 0.65 = 1.95$ m
- $2.40 - 1.95 = 0.45$ m
Answer. £$2.90$
- $4 \times 1.35 = 5.40$
- $2 \times 0.85 = 1.70$
- Total $= 7.10$
- Change $= 10.00 - 7.10 = 2.90$
Answer. £$5.90$
- Ribbon: $2.5 \times 1.60 = 4.00$
- Tape: $3.5 \times 0.90 = 3.15$
- Total before the voucher: $7.15$
- $7.15 - 1.25 = 5.90$