计算下面各题,能简算的要用简便方法计算.(1)0.75×99+0.75 (2)56-(23-16) (3)(8.5-4)×(0
计算下面各题,能简算的要用简便方法计算.(1)0.75×99+0.75(2)56-(23-16)(3)(8.5-4)×(0.32÷1.6)(4)56×[1÷(78?34)...
计算下面各题,能简算的要用简便方法计算.(1)0.75×99+0.75 (2)56-(23-16) (3)(8.5-4)×(0.32÷1.6) (4)56×[1÷(78?34)] (5)0.925×17+9.25×8.3 (6)715×89+815×29.
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西瓜A5n
2014-12-09
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(1)0.75×99+0.75
=0.75×(99+1),
=75;
(2)
-(
-
)
=
+
-
,
=
;
(3)(8.5-4)×(0.32÷1.6)
=4.5×0.2,
=0.9;
(4)
×[1÷(?)]=
×[1÷],
=
×8,
=
;
(5)0.925×17+9.25×8.3
=9.25×1.7+9.25×8.3,
=9.25×(1.7+8.3),
=9.25×10,
=92.5;
(6)
×+×=
×+×,
=
×(+),
=
.
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