计算下面各题,能简算的要简算.(1)1.2-0.5×1.8÷0.9 (2)(25+1...
计算下面各题,能简算的要简算.(1)1.2-0.5×1.8÷0.9(2)(25+16-215)×60(3)4397×98(4)1.8×14+3.2×25%(5)8×9×1...
计算下面各题,能简算的要简算.(1)1.2-0.5×1.8÷0.9 (2)(25+16-215)×60 (3)4397×98(4)1.8×14+3.2×25% (5)8×9×1.25 (6)9415-(3415-3.3)
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轻0151
2015-02-03
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(1)1.2-0.5×1.8÷0.9
=1.2-0.9÷0.9
=1.2-1
=0.2;
(2)(
+
-
)×60
=
×60+
×60-
×60
=24+10-8
=26;
(3)
×98
=
×(97+1)
=
×97+
=43+
=43
;
(4)1.8×
+3.2×25%
=(1.8+3.2)×0.25
=5×0.25
=1.25;
(5)8×9×1.25
=8×1.25×9
=10×9
=90;
(6)9
-(3
-3.3)
=9
-3
+3.3
=6+3.3
=9.3.
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