3. Section C (4 marks each)
Deduct ½ m for missing standard and non-standard unit.
41. 634 + 285 = 919
634 + 919 + 1 217 = 2 770 OR 634 + 919 = 1553
1 553 + 1 217 = 2 770
There were 2 770 people altogether.
42. 442 – 46 = 396
396 x 3 = 1 188
She has 1 188 red balls.
43. 3 units 78
1 unit 78 ÷ 3 = 26
26 x 10 = 260
He had $260 at first.
44. (a) 10 x 5 = 50
50 + 14 = 64
She works 64 h a week.
(b) 64 x 9 = 576
She is paid $576 in a week.
45. No. of 3 No. of 2 Total no. of bottles Total Capacity √/x
bottles bottles (80 )
15 15 30 45 + 30 = 75 x
17 13 30 51 + 26 = 77 x
19 11 30 57 + 22 = 79 x
20 10 30 60 + 20 = 80 √
He had 20 3-litre bottles.
Or
Assume all are 2-litre bottles,
30 x 2 = 60
80 – 60 = 20
3
4. so, there are 20 3-litre bottles.
30 – 20 = 10 (2-litre bottles)
To check,
10 x 2 = 20
20 x 3 = 60
20 + 60 = 80
There are 20 3-litre bottles.
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