Question 18 of 22intermediate🔧 ApplyNumerical9 marks
Find easy ways to solve the following problems. Write the answers in the given space. Share your thinking with the grade. a) 8787 – 99 b) 4596 + 104 c) 3459 + 21 d) 5010 + 95 e) 4990 + 310 f) 7844 – 15 g) 260 + 240 h) 1575 – 125 i) 3999 + 290
(i)
Answer
4289
(a)
Answer
8688
(b)
Answer
4700
(c)
Answer
3480
(d)
Answer
5105
(e)
Answer
5300
(f)
Answer
7829
(g)
Answer
500
(h)
Answer
1450
Explanation
(a) Subtract 100 and add 1: 8787 - 100 + 1 = 8688 (b) Add 100 and 4: 4596 + 100 + 4 = 4700 (c) Add 20 and 1: 3459 + 20 + 1 = 3480 (d) Add 100 and subtract 5: 5010 + 100 - 5 = 5105 (e) 4990 + 10 = 5000, then 5000 + 300 = 5300 (f) Subtract 10 and 5: 7844 - 10 - 5 = 7829 (g) 200 + 200 = 400, 60 + 40 = 100, 400 + 100 = 500 (h) 1575 - 100 = 1475, 1475 - 25 = 1450 (i) 3999 + 1 = 4000, 4000 + 289 = 4289