3 运动定律与简便运算
递等式计算:
(7.5+2.5)×0.25 710﹣18×4 5.4÷18+12
2÷
×
2.25×1.8+12.5×0.18 [1﹣(
+
)]×36.
直接写得数.
0.23= 9.7+0.03= 78×99+7.8= 2﹣0.2%=
×0÷0.18=
+
= 1﹣
×4+4×
= 0.18÷0.2=
1.5×8.4+3×0.3+15×10%= 30×(
+
﹣
)=
200﹣199+198﹣197+196﹣195+…+4﹣3+2﹣1=
×
+
×
+
×
+…+
×
=
1.8+62= 44÷
= 2.4×5= 1÷
+
÷1=
= 3.4﹣1
= 2﹣1
=
+
+
+…+
=
8.8×(
+
+
)= 0.75×16+
= 98÷
= 30
﹣(18.8+12×
)=
脱式计算.(能简算的要简算)
(1.6×
+3.6÷
)×
3.14×
+2.625×3.14
[
﹣(0.5+
×50%)]÷
1.8×25%+0.25×2.2.
直接写得数.
36+79= 15÷1%= 9.1﹣1.9= 7.2÷0.6=
+
=
=
﹣
=
= 1+30%= 0.25×8=
0.52= 6π= (
+
)×12=
= 99×0.8+0.8=





)÷(
+
)
×
+
375+450÷18×25
+
﹣
) 2﹣
÷
﹣
+
×25%
÷(1﹣
×
)
)
﹣
×0.4= 3.9÷10%=
÷
= 9×
÷9×
= 125%×8= 992+99= 5﹣1
﹣0.6=
×0.25+
×3.6 2.5×320×0.125
+
)×4.5 75×
+24×60%+
×
﹣
×
8﹣3
﹣2
÷1
2.75﹣1
+3
﹣2
.
×102.31+40
×102.31
×[
÷(
﹣
)]
+(
) (
×10.68+8.52×
.
×
+
×
9.6﹣11÷7+
×4 34÷[8
﹣(6
+5
÷9)] [9﹣(
+
)×24]÷1
.
÷[(
+
)×
]
÷0.15×
÷9+
×
2﹣
÷
﹣
.
×
= 3﹣
= 7÷1.4=
﹣
=
﹣
+
= (
+
)×4=
×
+
×
=
÷[
×(0.4+
)]
×
÷25%
)×
+
.
②
④
⑥
.
×
÷
﹣(
)]÷
×
+
÷6
×
)
﹣
)×9]×6
÷(0.8+
)+0.75 (
﹣
)×12
÷4×
+
÷
×
+[(
+
)×
]
×
+
÷
.
×
÷
﹣
×
+
÷3
)×
]
×99+
x=
(解方程)
与
的差是它们和的几分之几?
×
+
×
×
(
﹣
)×88
+12÷2
67×
÷(3﹣
﹣
)
÷75%﹣
32×25×125 56+144×
+
+
) 9.56﹣4.875+12.5%+1.44
×0.86+14%÷7
×9+
.
+
﹣
)
×0.86+14%÷
.
÷(50%×
÷
);
﹣[1÷(
+
)]×
;
﹣0.374+1
×0.374.
﹣
25×(4+
)
×
6.4×9.9+6.4×
.
﹣95.4×2 5
﹣
﹣
+
+
﹣
) 51÷〔(1.2+0.5)×5〕
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