问题
解答题
下面各题怎么样算简便就怎样算. ①725-25×4 ②54÷1.8+46 ③2.25×4.8+77.5×0.48 ④12×(
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答案
①725-25×4,
=725-100,
=625;
②54÷1.8+46,
=30+46,
=76;
③2.25×4.8+77.5×0.48,
=2.25×4.8+7.75×4.8,
=(2.25+7.75)×4.8,
=10×4.8,
=48;
④24×(
+1 2
-1 3
),1 6
=24×
+24×1 2
-24×1 3
,1 6
=12+8-4,
=20-4,
=16.