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Question Share and discuss in class the different methods each of you used to solve these questions.
Sum of numbers = 12 × 40 + 10 × 50 = 480 + 500 = 980
Solution:
Sum of numbers = 44 × 1 + 20 × 5 = 144
Solution:
Sum of numbers = 32 × 32 + 16 × 64 = 1024 + 1024 = 2048
Solution:
Sum of numbers = 17 × 3 + 18 × 4 = 51 + 72 = 123
Solution:
Sum of numbers = 15 × 22 + 25 × 22 + 35 × 22 = 330 + 550 + 770= 1650
Solution:
Sum of numbers = 18 × 125 + 8 × 250 + 4 × 500 + 1000 = 2250 + 2000 + 2000 + 1000 = 7250
InText Questions (Page 69)