3 运动定律与简便运算
能用简算的用简便算法计算,写出简算过程.
5.4×2.08﹣5.4×1.08 7.68×0.25×4 8.2×2.5+17.5 (12.4+16.8)÷0.4.
计算下面各题,怎样简便怎样算.
0.85×201 0.5×4.85×8 2.5×48﹣48
2.7+4.29+2.71+6.3 1.2×3.5+8.8×3.5.
计算下面各题,能简算的要写出简算过程.
①6.72+2.08×4×1.5
②12.56÷2.5÷0.4
③2.85×4.7+28.5×0.53
④9.88÷[5×(7.34﹣6.96)]
⑤2.5×3.2×1.25
⑥0.56×99.
计算下面各题﹙能简算的要简算﹚.
①97×
+
+
×2
②(9.9+9.9+9.9+9.9)×0.25
③﹙26+
﹚÷13
④
÷
﹣
×
⑤
+
÷﹙
﹣
﹚
⑥[
÷﹙
+
﹚]×
.
计算下列各题(能简算的要简算):
4.32÷2.4×1.7;
16.2×4.5+3.8×4.5;
9.05﹣3.86﹣3.14;
7.28+0.72÷0.9.
用递等式计算,能简便计算的用简便方法计算
(1)37.7÷13+1.8×2.4
(2)1.25×3.2×0.25
(3)1.06×(2.9+1.6)÷0.01
(4)6.27×5.2+5.8×6.27﹣6.27
(5)50.5÷[(15.6﹣3.5×4)÷3.2].
(1)79.76+84.7×0.2 (2)15.37+28.44+12.56
(3)(2.3×8.8﹣2.3×0.8)×1.25 (4)[5.2﹣(2.5+7.5÷5)]×1.2.
下面各题怎样算简便就怎样算.
18.65﹣3.7+1.35﹣6.3 30×[3.61÷(7.2﹣5.3)]
36÷[1.44×(0.1﹣0.05)] (16.5×3+3×7.5)÷6.





+0 6
.
×
÷
×15﹣
(3)(
﹣
)÷
(4)
÷[
×(1﹣
)].
+
+
+
×
+
.
×0.875×
÷[(
)×12]
×
+
4﹣
÷
﹣
.
﹣(
+
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﹣
+
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+
+
+
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﹣(
) 6﹣
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.
(2)2﹣
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(3)
(4)
÷(3﹣
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+(
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)×
÷7+
×
.
.
+
)+
﹣(
)
+
+
+
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+
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+
+
﹣(
)
+
﹣
+
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.
﹣
+
+
+
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+
﹣
8﹣

﹣
+
3.5+
+ 自已填一个非0数再计算.
×33﹣
×68×7×
(
﹣
+
)×12
×
÷
(0.75﹣
)×(
+
) [1﹣(
+
)]÷
.
24×(
+
+
)
2.4﹣2.4×
﹣
11.58﹣(7
+1.58)
×(
) 24×(
) (
)÷(
) 13÷39+(
)×13.
﹣
+
+
+
﹣(
+
)
﹣
+
.
×3.5 (
+
)×45 1﹣
÷
+
+
﹣
﹣
.
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