Question 25 of 36intermediate🔧 ApplyNumerical6 marks
Namita likes the number 9. She wants to subtract 9 or 99 from any number. Find a way to quickly subtract 9 or 99 from any number.
(a)
67 – 9 = ___
Answer
58
(b)
83 – 9 = ___
Answer
74
(c)
144 – 9 = ___
Answer
135
(d)
187 – 99 = ___
Answer
88
(e)
247 – 99 = ___
Answer
148
(f)
763 – 99 = ___
Answer
664
Explanation
(a) 67 - 9 = 67 - 10 + 1 = 57 + 1 = 58 (b) 83 - 9 = 83 - 10 + 1 = 73 + 1 = 74 (c) 144 - 9 = 144 - 10 + 1 = 134 + 1 = 135 (d) 187 - 99 = 187 - 100 + 1 = 87 + 1 = 88 (e) 247 - 99 = 247 - 100 + 1 = 147 + 1 = 148 (f) 763 - 99 = 763 - 100 + 1 = 663 + 1 = 664