give a rough estimate: a)489+243+5439. b)9437-234 "solve the problem"
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Answer:
a) 489 = 490
243 = 240
5439 = 5440
490 + 240 + 5440 = 6170
b) 9437 = 9440
234 = 240
= 9680
Step-by-step explanation:
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