问题
解答题
脱式计算,能简便的要简便计算.
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答案
(1)14-11.3-1.7,
=14-(11.3+1.7),
=14-13,
=1;
(2)54÷2.5÷0.4,
=54÷(2.5×0.4),
=54÷1,
=54;
(3)3.2×0.28+0.28×6.8,
=(3.2+6.8)×0.28,
=10×0.28,
=2.8;
(4)80.3-33.3×0.5÷0.37,
=80.3-16.65÷0.37,
=80.3-45,
=35.3.