Tag Archives: problem solving

Primary 4 April Problem Sums 5

P4-PSP-Apr-Ex5

Ans:

1–  2822 peo­ple

243 × 4 = 972 men

972 + 243 = 1215 adults

1215 + 392 = 1607 children

1607 + 1215 = 2822 peo­ple

 

2–  131 coins

2389 + 2531 = 4920 ( total num­ber of coins)

Qn 2

4920 — 120 = 4800

4800 ÷ 2 = 2400 ( Num­ber of coins in Box B at the end)

2531 — 2400 = 131 coins

 

3–  $1368

One blouse –>  $19 × 3 = $57

$57 × 24 = $1368

Con­tinue read­ing

  

Primary 6 April Problem Sums 4

P6-PSP-Apr-Ex 4

Ans:

1–  Richard  ->  $74  ,   Louis  -> $13

Total amount of money in the end– >  $87 + $17 = $104

Richard  :  Louis
7         : 1

8u  –>  $104
1u  –>  $13 (Louis)

$13 × 7 = $91

$91 — $17 = $74 (Richard)

 

2–  $94 146

4   1/2 years  ->  54 months

54 × $1299 = $70 146

$70 146 + 20 000 + 4000 =  $94 146

Con­tinue read­ing

  

Primary 5 April Problem Sums 1

P5-Apr-PSP-Ex 1

Ans:

1–  5   2/15 m

2  4/5 m + 2  1/3 m = 5   2/15 m

 

2–  $14

Total he spent ->  $40 — $5 = $35

Mag -> 1 unit

Book ->  2 units

3 mags + 1 book -> 5u

5u –> $35

1u ->  35 ÷ 5 = $7

2u -> $7 × 2 = $14

Con­tinue read­ing

  

Primary 4 March Problem Sums 4

P4-PSP-Mar-Ex4

Ans:

1–  $5728

2–  3476 apples

3–  300 swimmers

4–  a ->  1/2 ,   b -> 1/2

5–  389 pack­ets of rice

6–  600 stamps

7–  $800

8–  a ->  384 pies ,   b ->  64 pies

9–  a ->  450 cook­ies  ,   b ->  530 cookies

10–  a ->  60 books ,   b ->  160 books

11–  750 pies

12–  $32

  

Primary 6 March Review 5

P6-Mar-Review 5

Ans:

1–  3

2–  2

3–  3

4–  2

5–  1

6–  3

7–  4

8–  3

9–  4

10–  2

11–  10/17

12–  100

13–  5 train carriages

14–  24 m

15–  $12

16–  See attached Qn 16

17–  1   5/8 kg

18–  6 cards

19–  21 brownies

20–  6 more packets

21–  774 stickers

22–  $27

23–  a ->  130 stamps ,   b ->  80 stamps

24– 24 mangoes

25–  $240

26–  49.6%
 

  

Primary 5 March Problem Sums 3

P5-PSP-Mar-Ex3

Ans:

1–  128 cm

2–  $128 more

3–  160 marbles

4–  9800 more Eng­lish books

5–  3360 pupils

6–   14 exer­cise books

7–  54 years’ time

8–  10.5 kg

9–  270 cookies

10–  a ->  Feb­ru­ary ,   b -> $175

11–  $1000

12–  $380

13–  $222

14–  $1020

15–  3374 more children

16–  144 marbles

17–  30 mangoes

18–  111 more puppies

  

Primary 6 March Problem Sums 6

P6-PSP-Mar-Ex6

Ans:

1–  $2.50

2–  (2+ 7) years

3–  119.2 m

4–  $3.50

5–  $40

6–  32 marbles

7–  75.75 cm²

8–  $3600

9–  See attached Qn 9

10–  a ->  445 parcels ,   b -> $2225

11–  $75

12–  $70

13–  $1056

14–  80 cm

15–  175 ml

16–  204 balloons

17–  27 cor­rect answers

18–  $31

 

  

Primary 4 CA1 Revision 3

P4-CA1-Ex3

Ans:

1–  380 erasers

2–  40 800 flyers

3–  Pages 20 and 21

4–  $9

5–  a ->  2335 beads ,   b ->  4733 beads

  

Primary 3 CA1 Revision 3

P3-CA1-Ex3

Ans:

1–  $2558

2–  $4204

3–  7278 beads

4–  7870 workers

5–  216 paper clips

  

Primary 5 CA1 Revision 9

P5-CA1-Ex9

Ans:

1–  $156

2–  4 years ago

3–  $3.60

4–  154 desks

5–  See attached Qn 5

6–  $170.50

7–  176 jugs

8–  $800

9–  36 pupils

10–  12 054 paper aeroplanes

11–  35 marbles

12–  a ->  $72 ,   b -> 5/12

13–  6 almonds

14–  a ->  7/11  ,   b ->  60 stickers

15–  $480

16–  a ->  $14 ,   b -> $36

17–  288 stamps

18– 108 cream puffs