Question 7 - Mix Questions (Page 20 & 21) - Chapter 1 Class 7 - Large Numbers Around us (Ganita Prakash)

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Question 7 (Method 2) A calculator has only ‘+10,000’ and ‘+100’ buttons. Write an expression describing the number of button clicks to be made for the following numbers: (b) 92,100 Question 7 (Method 1) A calculator has only ‘+10,000’ and ‘+100’ buttons. Write an expression describing the number of button clicks to be made for the following numbers: (a) 20,800 (b) 92,100 (c) 1,20,500 (d) 65,30,000 (e) 70,25,700Thus, to summarise (a) 20,800 = 2 × 10,000 + 8 × 100 (b) 92,100 = 9 × 10,000 + 21 × 100 (c) 1,20,500 = 12 × 10,000 + 5 × 100 (d) 65,30,000 = 653 × 10,000 (e) 70,25,700 = 702 × 10,000 + 57 × 100 Question 7 (Method 2) A calculator has only ‘+10,000’ and ‘+100’ buttons. Write an expression describing the number of button clicks to be made for the following numbers: (a) 20,800 2 times press 8 times press ∴ 20,800 = 2 × 10,000 + 8 × 100 ∴ 92,100 = 9 × 10,000 + 21 × 100 ∴ 1,20,500 = 12 × 10,000 + 5 × 100 ∴ 65,30,000 = 653 × 10,000 ∴ 70,25,700 = 702 × 10,000 + 57 × 100 ∴ 92,100 = 9 × 10,000 + 21 × 100 Question 7 (Method 2) A calculator has only ‘+10,000’ and ‘+100’ buttons. Write an expression describing the number of button clicks to be made for the following numbers: (c) 1,20,500 12 times press 5 times press ∴ 1,20,500 = 12 × 10,000 + 5 × 100 Question 7 (Method 2) A calculator has only ‘+10,000’ and ‘+100’ buttons. Write an expression describing the number of button clicks to be made for the following numbers: (d) 65,30,000 ∴ 65,30,000 = 653 × 10,000 ∴ 70,25,700 = 702 × 10,000 + 57 × 100 Question 7 (Method 2) A calculator has only ‘+10,000’ and ‘+100’ buttons. Write an expression describing the number of button clicks to be made for the following numbers: (e) 70,25,700 702 times press 57 times press ∴ 70,25,700 = 702 × 10,000 + 57 × 100