问题
解答题
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答案
48×32≈50×30=1500,
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41×19≈40×20=800, 72×78≈70×80=5600, 61×60≈60×60=3600, 故答案为:1500,4000,2000,800,5600,3600. |
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48×32≈50×30=1500,
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41×19≈40×20=800, 72×78≈70×80=5600, 61×60≈60×60=3600, 故答案为:1500,4000,2000,800,5600,3600. |