Unit 3A – Reading/writing times; using timetables ... - Rising Stars

Unit 3D Calculation and money problemsUnit 3C – Adding times and finding time differences PB pp 28 & 29 PCM 5TEACHBegin by orally counting on using times, such as:• in 5s from 2:45 • in 10s from 6:20• in 10s from 11:25 • in 20s from 4:40• in 15s from 8:30• in 30s from 9:17 etc.Use a clock-face to support the activity where necessary.Then ask the children to complete the Plug in activity and discuss the answers together.Write the times 5:35 and 6:20 and ask children to read the times, describing them in different ways, e.g. five thirty-five ortwenty-five to six, and to show you them on a geared analogue clock. Explain that the lesson will focus on findingdifferences between pairs of times. Allow them to count around on the clock-face to find the difference between 5:35 and6:20 (45 minutes). Draw two lines similar to those in the Chat room activity to show two ways of finding the differencewithout a clock-face to look at. Encourage discussion and help children to talk about the lines in the Chat room activity.PRACTISEChildren can then use these strategies to solve the problems in the Power up exercise.As children move on to the harder problems, help them to realise that the number lines can include hours and then days.Answers can be given in different ways, e.g. 26 hours or 1 day and 2 hours etc.For further reinforcement, provide each pair with a copy of PCM 5 and a geared analogue clock for the Game play activity.The children should only use the cards from the lower part of the sheet.APPLYChildren can then use these strategies to solve the problems in the Explore investigation. Here times are given in 24-hournotation. Again encourage children to draw time lines to help solve each problem.AnswersPlug in: a 3:47, 3:52, 3:57, 4:02, 4:07, 4:12 b 7:23, 7:43, 8:03, 8:23, 8:43, 9:03 c 12:55, 1:10, 1:25, 1:40, 1:55Power up: 1a 30 mins b 42 mins c 2 hrs and 31 mins d 3 hrs and 35 mins e 40 mins2 7 hrs and 58 mins3 4 hrs and 1 min, 24 hrs, 17 hrs and 30 mins, 25 hrs and 30 minsExplore: a 2 hrs and 30 mins b 1 hr and 55 mins c 1 hr and 35 mins d 3 hrs and 25 mins e 1 hr and 45 minsf 2 hrs and 15 minsUnit 3D – Calculation and money problems PB pp 30 & 31TEACHThe Plug in activity can be used to encourage quick mental calculation of amounts of money. Show how amounts can berounded to a whole pound and then adjusted to find the exact answer, e.g. £5.99 × 4 = £6 × 4 – £0.04 = £23.96. Remindpupils that when writing money in pounds/pence notation they should not use the letter p, e.g. £3.05, not £3.05p. Discussalso the importance of not mixing up pounds and pence, e.g. when adding £4 and 50p not getting the answer £54 bymistake!PRACTISEPupils can then practice dealing with prices in pounds and pence by solving the problems in the Power up exercise.Encourage them to write number sentences to show how they worked out each problem. Discuss the answers together.Working with a partner they should talk about how to solve the questions in the Chat room activity. Ensure that theyrealise that they should divide to find the price of one and multiply to find the price of many. For further reinforcement,ask them to try the Game play activity. Each pair will require a set of counters and paper and pencils.APPLYThe Explore activity can be used to discuss ideas of value for money in real life. Further real-life examples from shops oradverts could also be introduced, e.g. buy one get one free offers etc.AnswersPlug in: a £5.98 b £19.95 c £2.80 d £2.70 e £27 f £3.60 g £1.80 h £7.96 i £12.30 j £21.35 k £3 l £6.25Power up: a £2.10 b £2.50 c £3.30 d £2.35 e £4.60 f £2.10 g £5.60 h £3.50Explore: a Li by 50p b Jo by £1.03 c Jo by 1p d Jo by 15p16