Question 15 Marks
A calculator has only ‘+1,000’, ‘+100’, and ‘+10’buttons. Write an expression describing the number of button clicks to be made for the following numbers :
(a) 850
(b) 2,140
(c) 10,500
(d) 7,53,020
(a) 850
(b) 2,140
(c) 10,500
(d) 7,53,020
Answer
View full question & answer→(a) 850 : Expression: 8 × 100 + 5 × 10 = 13 clicks
(b) 2,140 : Expression: 2 × 1,000 +1 × 100+ 4 × 10 = 7 clicks
(c) 10,500 : Expression: 10 × 1,000 + 5 × 100= 15 clicks
(d) 7,53,020 : Expression: 753 × 1,000 + 2 × 10 = 755 clicks
(b) 2,140 : Expression: 2 × 1,000 +1 × 100+ 4 × 10 = 7 clicks
(c) 10,500 : Expression: 10 × 1,000 + 5 × 100= 15 clicks
(d) 7,53,020 : Expression: 753 × 1,000 + 2 × 10 = 755 clicks