问题
解答题
怎样算简便就怎样算. (1)569+299 (2)7.6×5.3+7
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答案
(1)569+299
=569+300-1
=868
(2)7.6×5.3+7
+7.6×33 5 7 10
=7.6×(5.3+1+3.7)
=7.6×10
=76
怎样算简便就怎样算. (1)569+299 (2)7.6×5.3+7
|
(1)569+299
=569+300-1
=868
(2)7.6×5.3+7
+7.6×33 5 7 10
=7.6×(5.3+1+3.7)
=7.6×10
=76