Adapted: Learning + Powerful Maths Methods to Solve Challenging Problem Sums 1 & 2 © Singapore Asia Publishers Pte Ltd. All rights reserved. Reproducible for home/classroom use only. STRICTLY NOT FOR SALE. Look for other useful resources: www.sapgrp.com 1 Kaden had 6 marbles. After John gave Kaden 8 marbles, Amy realised that she had twice as many marbles as Kaden. How many marbles did Amy have? Solution: Kaden (in the end) → 6 + 8 = 14 Amy → 2 × 14 = 28 Amy had 28 marbles. Example Before and After 1 Kay had 7 marbles. After she gave Lee 1 marble, Joe realised that he had twice as many marbles as Kay. How many marbles did Joe have? Joe had marbles.
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Adapted:Learning+
Powerful Maths Methods to Solve Challenging Problem Sums 1 & 2© Singapore Asia Publishers Pte Ltd. All rights reserved.Reproducible for home/classroom use only.STRICTLY NOT FOR SALE.Look for other useful resources: www.sapgrp.com
1
Kaden had 6 marbles. After John gave Kaden 8 marbles, Amy realised that she had twice as many marbles as Kaden. How many marbles did Amy have?
Solution: Kaden(intheend)→6+8=14 Amy→2×14=28
Amy had 28 marbles.
Example
Before and After
1 Kayhad7marbles.AftershegaveLee1marble,Joerealisedthathehadtwice as many marbles as Kay. How many marbles did Joe have?
Joe had marbles.
EL_Before and After.indd 1 2019/6/26 11:16:20
Adapted:Learning+
Powerful Maths Methods to Solve Challenging Problem Sums 1 & 2© Singapore Asia Publishers Pte Ltd. All rights reserved.Reproducible for home/classroom use only.STRICTLY NOT FOR SALE.Look for other useful resources: www.sapgrp.com
2
Solutions:1Kay(intheend)→7–1=6Joe→2×6=12 Joe had 12 marbles.
2Scott(intheend)→17–3=14Matt→14÷2=7 Matt had 7 stickers.
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Primary 1&2
to Solve Problem SumsChallengingChallenging
Introduces extensive methods, concepts, thinking skills and heuristics essential for solving problem sumsTeacher’s comments to guide thinking processNon-routine questions to invoke out-of-the-box thinkingAdditional digital resources to complete learning experienceSolutions to develop the critical thinking process
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2 Scotthad17stickers.AftergivingJulie3stickers,ScotthadtwiceasmanystickersasMatt.HowmanystickersdidMatthave?
Matt had stickers.
EL_Before and After.indd 2 2019/6/27 18:10:19
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