Mathematics
By suitable arrangements, find the sum of:
(i) 311, 528, 289
(ii) 723, 834, 66, 277
(iii) 78, 203, 435, 7197, 422
Whole Numbers
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Answer
(i) 311 + 528 + 289
⇒ (311 + 289) + 528
⇒ 600 + 528
⇒ 1128.
Hence, 311 + 528 + 289 = 1128.
(ii) 723 + 834 + 66 + 277
⇒ (723 + 277) + (834 + 66)
⇒ 1000 + 900
⇒ 1900.
Hence, 723 + 834 + 66 + 277 = 1900.
(iii) 78 + 203 + 435 + 7197 + 422
⇒ (78 + 422) + (203 + 7197) + 435
⇒ 500 + 7400 + 435
⇒ 8335.
Hence, 78 + 203 + 435 + 7197 + 422 = 8335.
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