问题
解答题
计算下面各题.(能简算的要简算)
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答案
(1)4.38-1.56+0.62-0.44,
=(4.38+0.62)-(1.56+0.44),
=5-2,
=3;
(2)1375+450÷18×25,
=1375+25×25,
=1375+625,
=2000;
(3)18-(
+1 15
)×105,1 21
=18-(
×105+1 15
×105),1 21
=18-(7+5),
=18-12,
=6;
(4)36×0.25+65×
-1÷4,1 4
=36×0.25+65×0.25-1×0.25,
=(36+65-1)×0.25,
=100×0.25,
=25.