Tag Archives: Maths

Primary 3 February Review 3

P3-Feb-Review 3

Ans:

1–  2

2–  4

3–  2

4–  2

1233 + 3870 = 5103

5103 – 1789 = 3314

 

5–  3

heart= 68 ÷ 4 = 17

159 + 17 = 176

 

6–  2

7–  4

8–  1

9–  1

709 – 163 = 546

546 ÷ 7 = 78 bags

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Primary 5 CA1 Revision 11

P5-CA1-Ex11

Ans:

1–  3 000 303

2–  8

3–  49   1/2

4–  2500

5–  4   5/12

6–  18

7–  2   31/48

8–  2   19/24 kg

9–  $104

Cost of 4 pens –>  4 × $12 – $48

$48 + $56 = $104

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Primary 3 January Review 5

P3-Jan-Review 5

Ans:

1–  3

2–  2

3–  2

[Option 1 is the smallest value but it is an odd number]

 

4–  2

The smallest possible even number that can be formed is 3470.

 

5–  1

482 – 253 = 229 blue marbles

253 -229 = 24 more black marbles

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Primary 4 CA1 Revision 4

P4-CA1-Ex 4

Ans:

1–  2

2–  4

3–  4

4–  4

5–  4

6–  2

7–  4

3000 + 78 230 = 81 230 = 75 thousands, 62 hundreds, 30 ones

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Primary 2 January Review 1

P2-Jan-Review 1

Ans:

1–  2

2–  2

2 hundreds = 200

3 tens 6 ones = 36

200 – 36 = 164

 

3–  2

4–  4

5–  2

5 hundreds 2 tens = 520

3 hundreds 1 ten 4 ones = 314

520 – 314 = 206

 

6–  1

7–  1

8–  3

700 – 500 = 200 = 20 tens

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Primary 6 Algebra Level 3 Ex 3

P6-Algebra-L3-Ex3

Ans:

1–  (20 + 5n) cm

1st piece –>  1u

2nd piece –>  2u

3u –>  60 cm

1u –>  20 cm (1st piece)

20 cm + 5 cm = (20 + 5n) cm

 

2–  96z cm

Length of longest side –>  24× 2 = 48cm

24+ 24+ 4896z cm

 

3–  $(5 – 0.50d)

Cost of 5 pencils –>  $0.50 × = $0.50d

$5 – $0.50$(5 – 0.50d)

 

4–  a–>  (8+ 10) sweets ,   b –>  (20 + 10)/3 sweets 

Number of sweets Rebecca had –>  4f × 2 = 8sweets

Number of sweets Tanya had –>  (8 + 10)  ———– (a)

Total number of sweets –>  4f + 8f + 8+ 10 = (20 + 10)

(20+ 10) ÷ 3 = (20+ 10)/3 sweets  ————–(b)

 

5–  a –>  $(– 16)/2 ,   b –>  $34

2u –>  $(y – $16)

1u  (sandals) –>  $(y – 16)/2    ———— (a)

Cost of sandals ->  $(52-16)/2 = $18

$18 + $16 = $34   —————–(b)

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Primary 3 January Review 4

P3-Jan-Review 4

Ans:

1–  3

2–  2

[Add 201 to the previous term]

 

3–  2

4–  3

5–  4

6–  3

7–  3

9000 – 60 = 8940

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Primary 3 January Review 3

P3-Jan-Review 3

Ans:

1–  2

2–  3

3–  3

4–  3

5–  4

6–  1

7–  4

8–  3

9–  4

Number of girls in the class ->  24 + 5 = 29

29 + 24 = 53 pupils

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Primary 6 Algebra Level 1 Ex 5

P6-Algebra-L1-Ex 5

Ans:

1–  3

2–  4

3–  2

4–  4

Length of rectangle –>  (z+ 7) cm

z + z + 7 + z + z+ 7 = (4z + 14) cm

 

5–  1

6–  2

4 pencils –>  n cents

20 pencils ->  n¢× 5 = 5¢

5n cents – $1 = (5n – 100) cents

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Primary 3 SA2 Revision 7

P3-SA2-Ex 7

Ans:

1–  2

2–  4

3–  4

4–  1

5–  2

6 + 12 + 18 + 24 = 60

60 ÷ 6 = 10

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