find the sum by suitable arrangement 34+35+36+37+63+64+65+66. estimate the following product by using general rule: 9550x 14. What can you say about your answer.
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Answer:
(a) 837+208+363
=(837+363)+208
=1200+208
=1408
(b) 1962+453+1538+647
= (1962+1538) + (453+647)
= 4600
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