Ex 1.2, 8 - Chapter 1 Class 6 Knowing our Numbers

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Ex 1.2, 8 (Method 1) A student multiplied 7236 by 65 instead of multiplying by 56. By how much was his answer greater than the correct answer? (Hint: Do you need to do both the multiplications?) Wrong multiplication = 7236 × 65 Right multiplication = 7236 × 56 Difference between both answers = 7236 × 65 − 7236 × 56 Taking 7236 common = 7236 × (65 − 56) = 7236 × 9 So, wrong answer was greater than right answer by 65,124. Ex 1.2, 8 (Method 2) A student multiplied 7236 by 65 instead of multiplying by 56. By how much was his answer greater than the correct answer? (Hint: Do you need to do both the multiplications?)Wrong multiplication = 7236 × 65 Difference between wrong answer and right answer = 4,70,340 − 4,05,216 So, wrong answer was greater than right answer by 65,124.