Revision: Whole Numbers (Part 3) - SAP Education · buys the hi-fi and the television set and pays...
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P4 MATHS © Singapore Asia Publishers Pte Ltd Website: www.sapgrp.com | Facebook: Singapore-Asia-Publishers SAPMATP4_W44 Page 1/5 Taken from Learning Maths Book 4A Revision: Whole Numbers (Part 3) Do these word problems. Show your working clearly in the space provided. 1. Helen is 16 years old and her mother is 44 years old this year. How many years ago was Helen’s mother five times as old as Helen? 2. A hi-fi costs $328. A television set costs four times as much as the hi-fi. Mr Simon buys the hi-fi and the television set and pays for them in eight monthly instalments. How much must he pay for the electrical appliances each month? 3. Michael had $3600. After spending $320, he still had twice as much as Cynthia. Find the total amount of money they had at first. 1. Use ‘Guess and Check’ method. Guess Her mother’s age Helen’s age Is her mother 5 times as old as Helen? 1 44 – 4 = 40 16 – 4 = 12 40 ÷ 12 = 3 R 4 2 44 – 8 = 36 16 – 8 = 8 36 ÷ 8 = 4 R 4 3 44 – 9 = 35 16 – 9 = 7 35 ÷ 7 = 5 Helen’s mother was five times as old as Helen 9 years ago. 3. $320 $3600 ? Michael Cynthia 3280 2 2 12 12 8 3 8 0 1640 0 0 $3600 – $320 = $3280 $3280 ÷ 2 = $1640 Cynthia had $1640. $3600 + $1640 = $5240 The total amount of money they had at first was $5240. 2. ? ? ? ? ? ? 5 × $328 ? ? 328 × 5 1640 1 4 1640 8 16 4 0 40 40 0 205 5 × $328 = $1640 $1640 ÷ 8 = $205 He must pay $205 for the electrical appliances each month. Solutions:
Transcript of Revision: Whole Numbers (Part 3) - SAP Education · buys the hi-fi and the television set and pays...
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P4 MATHS
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SAPMATP4_W44Page 1/5
Taken from Learning Maths Book 4A
Revision: Whole Numbers (Part 3)
Do these word problems. Show your working clearly in the space provided.
1. Helenis16yearsoldandhermotheris44yearsoldthisyear.HowmanyyearsagowasHelen’smotherfivetimesasoldasHelen?
2. Ahi-ficosts$328.Atelevisionsetcostsfourtimesasmuchasthehi-fi.MrSimonbuysthehi-fiandthetelevisionsetandpaysforthemineightmonthlyinstalments.Howmuchmusthepayfortheelectricalapplianceseachmonth?
3. Michaelhad$3600.Afterspending$320,hestillhadtwiceasmuchasCynthia.Findthetotalamountofmoneytheyhadatfirst.
1. Use ‘Guess and Check’ method.
GuessHer mother’s age
Helen’s age
Is her mother 5 times as old as Helen?
144 – 4 = 40 16 – 4 = 12 40 ÷ 12 = 3 R 4244 – 8 = 36 16 – 8 = 8 36 ÷ 8 = 4 R 4344 – 9 = 35 16 – 9 = 7 35 ÷ 7 = 5
Helen’smotherwasfivetimesasoldasHelen9 years ago.
3. $320
$3600
?Michael
Cynthia
3280 2 2
12 12
838
0
1640
00
$3600 – $320 = $3280 $3280 ÷ 2 = $1640 Cynthia had $1640. $3600 + $1640 = $5240 The total amount of money they
hadatfirstwas$5240.2.
??????
5 × $328
??
328×51640
14
1640 8 16
4 0
4040
0
205
5 × $328 = $1640 $1640 ÷ 8 = $205 He must pay $205 for the electrical
appliances each month.
Solutions:
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P4 MATHS
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Taken from Learning Maths Book 4A
Revision: Whole Numbers (Part 3)
Do these word problems. Show your working clearly in the space provided.
1. Kennyboughtabookandfouridenticalpensfor$12.Charlieboughtthesamebookand twosimilarpens.Charliepaid$4 less thanKenny.Whatwas thecostof thebook?
2. 250adultsandsomechildrenwenttoazoo.Theadmissionticketforeachadultwas$12andtheadmissionticketforeachchildwas$9.If$6915wascollectedfromthesaleofallthetickets,howmanychildrenwenttothezoo?
3. MrStewardreceivedabonus.Hegave$2000tohiswifeanddistributedasumofmoneyequallyamonghissixchildren.Hewasleftwith$1350,whichwas$400morethantheamountofmoneygiventoeachchild.Howmuchwashisbonus?
2. 250 × $12 = $3000 250×12
5002503000
1
3915 9 36
3127
4545
0
435 $3000 was collected from
the sale of all the adult tickets. $6915 – $3000 = $3915 $3915 ÷ $9 = 435 435 children went to the zoo.
1. PP
$12
PP B
PP B$4
?
Charlie
Kenny
$4 ÷ 2 = $2 Each pen cost $2. $12 – (4 × $2) = $4 The cost of the book was $4.
3. $1350 – $400 = $950 Each of his six children received
$950. 950
×65700
3
$2000 + (6 × $950) + $1350 = $2000 + $5700 + $1350 = $9050 His bonus was $9050.
Solutions:
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P4 MATHS
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Taken from Learning Maths Book 4A
Revision: Line Graphs and Tables
Study the line graph below and answer questions 1 to 5.
Thelinegraphshowsthenumberofvisitorstothesciencecentreinamonth.
Number of visitors to the science centre
4000
2500
1000
500
01st 2nd 3rd 4th
Week
1500
2000
3000
3500
1. Inwhichweekwasthenumberofvisitorstheleast?
2. What was the increase in the number of visitors from the 3rd to the 4th week?
3. Whatwasthedecreaseinthenumberofvisitorsfromthe1sttothe2ndweek?
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P4 MATHS
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Taken from Learning Maths Book 4A
Revision: Line Graphs and Tables
4. Whatwasthedifferenceintheweekwiththegreatestnumberofvisitorsandtheweekwiththelowestnumberofvisitors?
5. Ifeachadmissionticketcost$9,howmuchdidthesciencecentrecollectduringthefourweeks?
Solutions:1. 3rd week There were 500 visitors in the 3rd week.
2. 2250 visitors 2750 – 500 = 2250
3. 1750 visitors 3500 – 1750 = 1750
4. 3000 visitors 3500 – 500 = 3000
5. $76 500 3500 + 1750 + 500 + 2750 = 8500 8500 × $9 = $76 500
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P4 MATHS
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Taken from Mental Mathematics Book 4
Do these sums mentally.
1. 42.13÷10 =
2. 31×1.1 =
3. 66×2.9 =
4. 4.9×58 =
5. 69×1.1 =
6. 42×3.2 =
7. 5.4÷10 =
8. 77×7.6 =
9. 60×2.35 =
10. 20×4.87 =
Solutions: 1. 4.213 2. 34.1 3. 191.4 4. 284.2 5. 75.9 6. 134.4 7. 0.54 8. 585.2 9. 141 10. 97.4
Mental Maths: GENERAL REVISION 7
