Answer key · Set A
Saving with a friend
15 3 + 2 = 5. Two jars filling at once go faster.
210 weeks Jo saves 2 coins a week, so alone Jo needs 10 weeks. 7 weeks is Ria alone, and 4 weeks is both together.
315 5 + 5 + 5 = 15. Each Saturday adds 3 + 2 = 5 coins.
4Ria Ria reminded Jo of the tent, and Jo put the comic back, because a friend helps you keep going.
5True Together they save 5 coins a week, and 5 × 4 = 20. Ria saves 3 a week, so alone she needs 7 weeks.
61-D, 2-C, 3-B, 4-A Add the two amounts: 3 + 2 = 5, 4 + 3 = 7, 2 + 2 = 4 and 5 + 3 = 8.
74, 3, 2, 5, 1 The idea came first, then the plan, then the comic, then the full jar, and last the tent.
816 5 + 3 = 8 coins a week, and 8 + 8 = 16.
9Agreeing on a plan first, Writing down who puts in what, Both friends putting coins in A plan, a notebook and both friends putting coins in keep it fair. Hiding the jar or forgetting who put in what does not.
103 and 2 make 5, not 6 3 + 2 = 5 coins a week, and 5 × 4 = 20 is the price of the tent.
113 7 − 4 = 3. Together is 3 weeks sooner than Ria alone, and 6 weeks sooner than Jo alone.
12Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.