Multiplying decimals to thousandths and the metric system
Answers are for parents and teachers.
1
Use an area model to work out 2.6 × 1.4.
2 × 1 = 2, 0.6 × 1 = 0.6, 2 × 0.4 = 0.8, 0.6 × 0.4 = 0.24. Sum: 3.64.
2
Work out 5.08 × 3.5.
508 × 35 = 17,780 and three decimal places: 17.780 = 17.78.
3
Work out 0.15 × 0.06.
15 × 6 = 90 and four decimal places: 0.0090 = 0.009.
4
A tailor needs 1.85 m of cloth for one shirt. How many metres are needed for 24 shirts? Give the answer in centimetres too.
185 × 24 = 4,440 and two decimal places: 44.4 m. In centimetres: 44.4 × 100 = 4,440 cm.
5
Change 0.062 km to metres and 2.75 L to millilitres.
0.062 × 1,000 = 62 m. 2.75 × 1,000 = 2,750 mL.