3 运动定律与简便运算
计算下面各题,能用简便方法计算的要用简便方法计算.
×[
÷(
+
)] (873×477﹣198)÷(476×874+199)
199.9×19.98﹣199.8×19.97
×
+16×
+
×
.
脱式计算,能简算的要简算:
×
+
÷
[
﹣(
﹣
)]×
9999+9998+9997+9996
812﹣700÷(9+31×11) 1.25×3.6×8×2.5﹣12.5×2.4
+7.4﹣
+3.6.
计算下面各题,简算的要简算:
6×(1﹣
)+0.75×
37+18×37+19×63 1÷28×91﹣73×
﹣17÷28
[4.8﹣0.24÷(5﹣4.76)]÷3.8 (1﹣
)÷[
].
(1)(16.1﹣15.3)×
(2)1÷(
)×
(3)(
)÷(11﹣
) (4)128×41.5﹣1.5×128﹣40÷
(5)
的
除以1.85与
的差,商是多少? (6)一个数的40%比它的3倍少10,求这个数.
脱式计算(能简算的要用简便方法计算).
(1)1
×(2
×
﹣5
÷4
) (2)99.9*98+(0.8﹣
)*999
(3)
*1.6÷(10﹣
÷
) (4)(1234+4567*7890)/(4568*7890﹣6656)
3÷〔9×(
)〕×12 93.6÷〔(6﹣2.88)×(
﹣1.875)〕
7.05×37+64×7.05﹣7.05 
÷〔7.8+
×(2.75+1.25)〕 8.1÷(
)÷
.





﹣
)÷
(
﹣
+
)÷
7.28÷0.8÷12.5
.
(2)
.
+
) 2006×101﹣2006
+(
﹣
)÷
.
×27﹣
÷(1﹣
)×
9
×
(6
﹣3
)÷(13+11
)
(2)12×(
)
÷
﹣
×
85×25+85×85﹣10×85 13.8﹣
+6.2﹣
.
+
)×8+
4.5﹣(
+1.5)﹣
(
×
)÷
÷[
×(
+
)].
=
=
=
=
=
(2)
(4)
.
﹣
)×(1﹣
) ②
×
+
÷
+
)]×
÷2 ④(
+3.9+
+16.1)÷
.
)
+
)×(
﹣
)
×
+
÷
÷〔(
﹣
)×3〕 (
)×12=
÷
+
×
②58×102
×[
﹣(
﹣
)] ④0.888×125×73+999×73.
=
=
=
=
=
=
= 0.33= 1÷7×24= 5﹣1.4﹣1.6=
5.6×
﹣4
×3.75+0.88×
+94
+9.476+0.9476)÷0.1111
.
+
)]÷
4
﹣3
+1
﹣2
×[
﹣(
﹣
)] 4.6×1
+8.4÷
﹣1
)÷9
(
﹣
)÷
×16.31﹣2.31÷
36÷[(
)×3].
×( 1
+2
)÷
×2
99
﹣98
+97
﹣94
+…+1
(2)
(4)
.
÷2.5 (2)(
+
)÷
+
+
+
+
+
.
﹣9
+(8
﹣2
) ②(9.1×7.5×4.6)÷(1.3×2.5×2.3)
×
+
×
+
④



.


.
+
)÷(1﹣
×
) ②3.2×1.25+4.8×1
﹣4
)÷1
]×25% ④
+(
﹣
)÷
.
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