3 运动定律与简便运算
看谁算得准.
(1)7.2×99+7.2 (2)5﹣(
÷
+
÷
) (3)(
+
)×7+
(4)0.125×2.5×3.2 (5)1.05×(3.8﹣0.8)÷6.3 (6)
÷[(
﹣
)×
].
用你喜欢的方法计算下面各题.
450÷18+375 3.68﹣0.82﹣0.18 36×(
+
)
×24﹣6×
﹣(
+
) 8.24﹣8.24÷4 19÷[(
+
)÷
]
×
÷
+
×71+19÷
.
直接写出得数.
777×9+111×37= 5﹣
﹣
=
+
﹣
+
=
÷
×5=
72÷1.2+72÷1.8= 9+3÷7÷6×14=
+
+
+
= 8.4×13﹣3×8.4=
60×(1﹣
﹣
)=
×996=
×
﹣
)÷
+12.5%×
×(
+
)÷
.
×3.25+9
×3
÷(
×
)﹣
3.64÷4+4.36×25% 25×1.25×32.
.
×
+
(
+
﹣
)×72 18.38+4.62﹣2.38.
+6
)
÷
+
.
+
)÷
+
.
(4)
÷[(
+
)÷
].
+2.1×0.75
)×
÷
.
×
﹣
÷7 ③
④
.
﹣0.375+
﹣
②12.5×0.32×25 ③
÷6+
×
④
×0.25+
×
②73÷0.8÷12.5 ③
④
.
②(7.5+7.5+7.5+7.5)×125×2 ③
④
.
+
)=
+
﹣
= 9﹣
﹣
=
×24÷
=
.
×7×5 ③
×1997+
+
.
.
÷23+
×
. 3.5÷8÷0.125.
﹣
+
﹣
360÷15﹣2.5×1.4 43×99+43
+
+
)×72
÷[(
+
)÷
].
﹣
)
﹣
﹣
+
632﹣486÷18+395
﹣(
+
)]÷
0.75×74+
×25+75%
+
+
+
+
+
.
)÷
+
+
﹣
)
﹣
)×42 (
+
)×29×23
÷[
÷(
﹣
)]
÷[(
+
)×
] 231÷231
.
+0.25×
÷[1÷(
)] (
+
﹣
)×30×2
×(
﹣
÷2)
2÷
﹣
×99+
+5.28+
+4.72 (2)85.7×16+14.3×16.
③
.
×
×65+
+
+
1.25×8.8 2.5×37+6.3×25.
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