Anskeysformathematicspracticepapers78and9
- 1. Answer Key Practice Paper 9 Section A (20 x 2 marks = 40 marks) 1 4 9 4 17 1 2 3 10 3 18 2 3 4 11 2 19 4 4 2 12 4 20 4 5 2 13 3 6 2 14 1 7 1 15 1 8 4 16 1 Section B (16 x 2 marks = 32 marks) 21 3699 – 2200 = 1499 22 75 x 4 = 300 300 x 5 = 1500 23 5 1 5 , , 12 2 6 24 1096 25 3700m + 890m = 4590m 4590m – 1040m = 3550m 3550m = 3km 550m 26 4cm x 4cm = 16 cm² 16cm x 6cm = 96 cm² 96 cm² - 16 cm² = 80 cm² 27 36 x 50¢ = $18 $18 ÷ $2 = 9 28 50 29 90 – 40 = 50 30 40 + 50 + 70 + 60 + 90 = 310 520 – 310 = 210 1
- 2. 31 $1.50 + $1 = $2.50 $2.50 x 10 = $25 $40 - $25 = $15 32 5 1 10 1 11 + = + = 8 16 16 16 16 16 11 5 - = 16 16 16 33 One line parallel to AB 34 = 432 =4 ÷ = 432 ÷ 4 = 108 35 Isaac: $120 x 2 = $240 $240 + $120 = $360 1 of $360 = $360 ÷ 2 = $180 2 36 2620 m + 2448 m = 5068m 2153 m + 2766 m = 4919m = 4 km 919 m 37 4.45p.m. --- 5.45p.m. (1 hr) 5.45 p.m. --- 6.15p.m. (30 min) 1 hr + 30 min = 1 h 30 min 38 4250 mℓ x 2 = 8500 mℓ 1340 mℓ x 2 = 2680 mℓ 8500 mℓ + 2680 mℓ = 11180 mℓ 11180 mℓ = 11 ℓ 180 mℓ 39 7cm x 7cm = 49 cm² 49 cm² x 3 = 147 cm² or 49 cm² ÷ 2 = 24.5 cm² 49 cm² + 49 cm² + 24.5 cm² + 24.5 cm² = 147 cm² 40 1 kg = $12 g 500g = $12 ÷ 2= $6 $12 x 6 = $72 6 kg 500g : $72 + $6 = $78 $100 - $78 = $22 2
- 3. Section C (5 x 4 marks = 20 marks) 41. (a) 8 x 16 = 128 208 – 128 = 80 80 watches are left after 16 days. (b) 80 ÷ 8 = 10 or 10 x 8 = 80 It will take him 10 days to sell the remaining watches. 42. 1 chocolate cake: 4 kg ÷ 2 = 2 kg 3 chocolate cake: 2 kg x 3 = 6 kg 4 chocolate cake: 2 kg x 4 = 8 kg 2 apple pies: 8 kg 500 g – 6 kg = 8500 g – 6000 g = 2500 g 1 apple pie: 2500 g ÷ 2 = 1250 g or 1 kg 250 g 4 chocolate cakes and 1 apple pie: 8 kg + 1 kg 250 g = 9 kg 250 g 3
- 4. 43. (a) 224 ÷ 7 = 32 He got 32 packets of sweet. (b) 32 – 24 = 8 8 packets of sweets were left. 8 x 7 = 56 8 1 = 32 4 1 of the packets of sweets was left. 4 44. 150 m x 3 m = 450 m² 450 m² ÷ 50 = 9 9 x $54 = $486 It would cost Mr Lee $486 to paint the wall. 45. Kate ? Paul Tom Paul: $100 + $128 = $228 Tom: $228 + $100 = $328 $328 x 2 = $656 $100 + $228 + $656 = $984 The total sum is $984. 4