3 运动定律与简便运算
计算各题,能简便的要用简便方法计算.
1.25×25×3.2 4.75+0.25×
21×(1﹣
)÷
15.75﹣(2
+5
) (6×
﹣4)÷
÷
+
×
.
用递等式计算下面各题,能简算的要简算.
(
+
)÷
+
10.2﹣(1.25+2.5)÷1.5
35×(1﹣
)÷
(156×
﹣21)×
3.4×99+3.4.
计算下面各题,后两题请用简便方法计算.
2+0.45÷0.9﹣
;
÷[
×(
﹣
)];
93+1.06+
+2.94;
3.78×6.2+3.78×3.8.
脱式计算.(能简算的要简算)
(1)0.125×
+1.875÷4 (2)27×99
(3)30.1﹣16.8÷3.5×6.2 (4)
×2.5×
×0.4
(5)
÷[
(﹣
)÷
] (6)(
﹣
×
)÷
.
7.08÷(1.25×0.8)=
﹣
+
=
×
÷
×
= 5.38﹣(2.1+2.38)=
(
﹣
)×63= 0.5×(2.6﹣2.4)= (0.18+0.9)÷0.9= 3﹣
﹣
=
脱式计算.(友情提醒:有的可以简算)
4000﹣3456÷32×5 3.68﹣3.6×0.2+0.18 48×9.9+48×0.1
(1﹣
)÷0.25×4 (6﹣6×
)÷12 2÷[
+(
﹣
)].
脱式计算.
2004×8.1+1.9×2004
﹣(
+
×
)×
(1﹣
)÷(
+
)
4.38×0.75+3.62×0.75 12
×11﹣12.5 35÷[(
﹣
)×3].
直接写出得数.
﹣
= 2.25+1.75= 4﹣
= 100×
÷25= (
+
)×15=
35×
= 800﹣375= 1﹣0.5+9.5= 0.25×7×4=
÷
×
=
脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程).
(84×27﹣2166)÷17
×3.7+5.3÷
+2.2 (0.75÷3﹣0.1)×(1﹣
)
脱式计算.(能简算要简算的)
①2×3.6+3.6×7+3.6 ②1.25×32×25 ③5.42﹣(3.75﹣0.58)
④34.7﹣
+65.3﹣
⑤
×
×1
×1
⑥23×
+57÷
.






×4.8.
×3+
﹣
+
)×36
.
+
﹣
)
)
÷[(
+
)÷
].
﹣2.25+
×
+
×
÷[(
+
)×
].
÷8+
×
﹣
﹣
×(
﹣
)÷
×31﹣
×1÷8
×
+
+
+
+
(
﹣
)×24
﹣8÷8×
×[
﹣(
﹣
)]
÷
×(
﹣
) 6÷[
×(
﹣
)].
×(9﹣
÷5)
÷[
×(
﹣
)]
.
﹣
)×
×3
÷
+
)×
﹣(
+
)].
+
)×45 (100﹣19)÷(1.63+1.07) 18.7﹣3.375﹣6.625 6+
×
.
+4.7﹣3
47.5×0.25+
×52.5
+(
+
)×
10.2÷[28×(1﹣
)+
].
= 0.32=
×60=
﹣
= 1﹣
= 10×10%=
+7
÷
﹣2
×
2.4×[3
÷(3﹣7.2×
)].
﹣
=
+
= 4÷
×
=
÷
= 0.25×9+0.25=
;
.
×23+
×7
÷[(
﹣
)÷
]
+
+
+
+
.
6.28﹣
﹣
+3.72 (0.125+
+
)×24.
+
)×15×17
.
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