Question

9. Find the sum by suitable rearrangements :
(i) 425 + (- 207) + 75
(ii) - 142 + 311 + (- 58)
(iii) 236 + 728 + (228)
(iv) 143 + (-567) + 257 + 167
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Answer 1

Answer: 425+(-207)+75=293

Step-by-step explanation:

So what you really want to do for this equation is basically add up both positive numbers and then add the -207 and then that will give you the answer or you do like I did and do 425+(-207)+75 and put you answer and that’s what ou could do for the other three! I hope this is very helpful!

Answer 2

Answer:

(i) 425 + (- 207) + 75

= 425 - 207 + 75

= 218 + 75

= 293

(ii) - 142 + 311 + (- 58)

= - 142 + 311 - 58

= 169 - 58

= 111

(iii) 236 + 728 + (228)

= 236 + 728 + 228

= 1192

(iv) 143 + (-567) + 257 + 167

= 143 - 567 + 257 + 167

= −424 + 424

= 0