Y9 Booster Lesson 4. Objectives – what you should be able to do by the end of the lesson Use a calculator efficiently Use the function keys for powers,

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Presentation transcript:

Y9 Booster Lesson 4

Objectives – what you should be able to do by the end of the lesson Use a calculator efficiently Use the function keys for powers, roots, brackets and memory Deal with remainders using a calculator

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x

Estimate: 49 x 51 What about the units column? So the answer is about With a digit column of

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x

Estimate: 1769 ÷ 29 The answer is about:

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x (60)

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x (60)

1769 ÷ 29 Possible answers: 61, 63.7, 64 Are any of the answers more likely - discuss with a partner

Estimation jigsawM x ÷ 9532 x ÷ ÷ x ÷ 7138 x x ÷ 2971 x ÷ ÷ 8149 x ÷ 9149 x

Complete the estimation jigsaw. If more than one answer is close to an estimate try to investigate for further clues. As a last resort, make your best ‘guess’. Working in pairs:

On your calculator try the following calculations: 2345 – (23 x 21) 5³ - (87 -19)² (23 x 47) – (178 ÷ 4) ( )

On your calculator try the following calculations: 2345 – (23 x 21) 5³ - (87 -79)² (23 x 47) – (178 ÷ 4) ( )

Packets of biscuits are packed in boxes which hold 144 packets. A factory makes packets of biscuits. Can all the packets be put into completed boxes? How many completed boxes will there be? How many packets will be left over? 5 How many days, hours, minutes and seconds are there in a million seconds? What about 10 million seconds? Calculator problemsM4.2

Packets of biscuits are packed in boxes which hold 144 packets. A factory makes packets of biscuits. Can all the packets be put into completed boxes? How many completed boxes will there be? How many packets will be left over? 5 How many days, hours, minutes and seconds are there in a million seconds? What about 10 million seconds? Calculator problemsM

Packets of biscuits are packed in boxes which hold 144 packets. A factory makes packets of biscuits. Can all the packets be put into completed boxes? How many completed boxes will there be? How many packets will be left over? 5 How many days, hours, minutes and seconds are there in a million seconds? What about 10 million seconds? Calculator problemsM

4Packets of biscuits are packed in boxes which hold 144 packets. A factory makes packets of biscuits. Can all the packets be put into completed boxes? How many completed boxes will there be? How many packets will be left over? How many full boxes? ÷ 144= full boxes and of a box 138 full boxes How many packets left over? Either – (138 x 144) Or x packets Answer: 138 full boxes with 128 packets left over

Packets of biscuits are packed in boxes which hold 144 packets. A factory makes packets of biscuits. Can all the packets be put into completed boxes? How many completed boxes will there be? How many packets will be left over? 5 How many days, hours, minutes and seconds are there in a million seconds? What about 10 million seconds? Calculator problemsM

5How many days, hours, minutes and seconds are there in a million seconds? What about 10 million seconds? How many minutes? How many hours? How many days? ÷ 60 = minutes minutes and of a minute x 60 = 40 secs ÷ 60 = hours 277 hours and of an hour x 60 = 46 mins 277 ÷ 24 = days and of a day x 24 = 13 hours Answer: 11 days, 13 hours, 46 minutes and 40 seconds

5How many days, hours, minutes and seconds are there in a million seconds? How many minutes? How many hours? How many days? ÷ 60 = minutes minutes and of a minute x 60 = 40 secs ÷ 60 = hours 277 hours and of an hour x 60 = 46 mins 277 ÷ 24 = days and of a day x 24 = 13 hours Answer: 11 days, 13 hours, 46 minutes and 40 seconds What about 10 million seconds?

Objectives – how have we done? Use a calculator efficiently Use the function keys for powers, roots, brackets and memory Deal with remainders using a calculator

Thank you for your attention