Unit 13 – Fractions and decimals
4 Look at these part-whole diagrams. Can you explain why pairs that total 10 can help us here?
0.5
0.5
1
0.7
0.3
0.6
0.4
1
1
We can use the diagrams to help find related addition and subtraction facts. 0.6 + 0.4 = 1 0.4 + 0.6 = 1 1 − 0.4 = 0.6 1 − 0.6 = 0.4
1 Complete these additions and subtractions. Which methods will you use? (a) 0.3 + 0.5 (b) 0.3 + 0.8 (c) 0.9 + 0.3 (d) 0.9 + 0.4 (e ) 0.8 − 0.3 (f) 0.8 − 0.5 (g) 0.9 − 0.5 (h) 0.9 − 0.6 2 Write two addition sentences and two subtraction sentences to match the part-whole diagram.
0.8
0.2
1
Solve these problems. (a) Jade runs 0.3 kilometres further than Riana. Jade runs 0.8 kilometres. How many kilometres does Riana run? (b) A parcel has a mass of 0.8 kilogram. A box is 1 _ 2 kilogram heavier. What is the mass of the box in kilograms?
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04/05/2022 15:51
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