3 运动定律与简便运算
用简便方法计算,写出简算过程
(1)2.5×3.2×1.25 (2)4.05﹣(2.05+
)
(3)5.39+
+4.61+
(4)0.588×
+4×9.412+
×0.588.
计算.能简算的要简算,并写出简算过程.
(1)(0.12+0.22+0.32+0.42)2÷(0.13+0.23+0.33+0.43)
(2)3.97÷7+
×4.03﹣
(3)0.0021×[1
+2.93÷(11
﹣1.9)]÷0.001
(4)0.125×0.25×0.5×64
(5)4936×(0.75×42.7﹣0.573×25+57.3)÷3.
计算下面各题,能用简便方法算的要简算.
24.56﹣
﹣4.56﹣4.75 4.2×5.43+4.57×4.2
6035﹣450÷30×15
÷[
÷(
﹣
)].
用自己喜欢的方法计算下面各题.
57.5﹣4.25﹣15.75 (
+
)×8+
4.5﹣(
+1.5)﹣
125×32
×16.31﹣2.31÷
(
+
×
)÷
.
脱式计算,写出主要计算过程,能用简便算法的要用简便算法.
①496﹣23×16 ②7.28÷0.8÷12.5 ③(8.8﹣23.4×
)÷
④
﹣(
+
) ⑤
×
+
×
⑥
÷(
﹣
)×12.
计算下面各题,能简便的要简便.
0.35×101 43﹣(
+24÷
) 2.125×
+1.875÷4
3÷
﹣
÷3 0.4×(4.7﹣3.65) 12.5×2.6×0.8.





+2.72+
(
+
)÷
168.1÷(4.3×2﹣0.4)
+36×0.375
÷
.
×1.125 45×0.25+36÷4+
×19
﹣0.35﹣0.65 25×1.25×32.
(2)
(3)(1﹣
)×26+26÷13×2.
+4.7+1
+5.3 14.71﹣5
﹣4
.
+
)×24.
81﹣(3.81﹣1.65)+2.25 24×(
﹣
+
).
+
) 0.46×98+0.92
×
÷
+
.
+26.34+
+
.
÷[
×(0.5+
)] ③43﹣43×0.9 ④
÷
﹣
×6.
﹣(
﹣
)]×
+
+
)×24
+
+
+
+
+
+
+
.
﹣(2
﹣
)
×4
+5
÷1
+
1125﹣996 9.63÷2.5÷4.
×17﹣12×
+
﹣
+
) (4)(50×49×48)÷(25×24)
+3.14×
(2)
×25%+
×2.2
+
)
÷[56×(
)].
+
﹣
)×4×9
(简算)
÷
[1﹣(
+
)]×36.
(
+
﹣
)×30 64×3.75+3.75×36 40.2﹣4÷80×2.4.
×
)÷
÷6+
×
(4)18.8﹣
﹣3.8﹣
.
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