3 运动定律与简便运算
用自己喜欢的方法计算.
(1)1.73+1.73×3.5+5.5×1.73
(2)3.5×[(1﹣0.05)÷1.9]
(3)68×0.11+8.9×6.8
(4)8.88÷3.7×1.25.
计算下面答题(能简算要简算)
1.69÷26 2.5×1.25×32 2.3×3.9÷(22﹣19.7)
0.8×[13﹣(3.12+5.28)] 40.08﹣20.5×4÷2.5+1.6 5.4×0.6+4.6×0.6.
计算下面各题,能简便的就简便.
(1)5.5×17.3+6.7×5.5
(2)1.5×105
(3)9.07﹣22.78÷3.4
(4)3.8+4.29+2.1+4.2.
计算下面各题,能简算的要简算.
125×9.3×0.08 13.7×102﹣2×13.7
(6.7+6.7+6.7+6.7)×2.5 4.5÷[(27.8﹣25.3)×0.4]
0.096÷0.01+(75﹣28÷112) 90.8﹣(7.03﹣2.17)×4.5.
下面各题怎样简便就怎样算.
(1)3.7×99+3.7 (2)
×7.7+3.3×0.75﹣75%
(3)5.93+0.64+0.07+0.36 (4)(7.9﹣3.06÷0.68)×1.5
(5)78÷2.5÷0.4 (6)105×(
+
)
计算下面各题,能简算的要简算.
8.5×(2.36+2.42)÷0.25 3.9÷1.3×6 4.25×6.3+3.7×4.25
205×99 25.6﹣7.49﹣2.51 2.5﹣(6.8﹣4.9)×0.8.
计算下面各题(能用简便方法的用简便方法).
22.7×1.25×O.8 3.91×2.8+6.09×2.8
9.83×(3.8﹣2.3)+1.5×6.17 3.6×51+36×4.9
7.8×9.9 5.4﹣3.2+12.6﹣7.8
7.2×4.1﹣9.5÷7.6 8.125×3+7×8.125
(0.75×27.5﹣3.405)÷0.8 [0.16+(3﹣1.272)÷1.2]×1.25.
用自己喜欢的方法计算.
(1)99×0.79+0.79 (2)
÷
+
×
(3)2012×
(4)10.58﹣(5.58﹣
) (5)(1﹣0.05)÷0.19+0.1 (6)5.25×[1﹣(0.45﹣0.15)].
计算下面各题,怎样简便就怎样算.
1.29+3.7+0.71+6.3 23.4﹣8.54﹣1.46 6.75×0.5+4.86
19×3.6﹣3.6×9 2.5×1.8×0.04 10.24÷1.25÷8.
口算:
160+270= 730﹣250= 260+90= 36+74= 2400÷200=
770+140= 11×500= 9900÷900= 22÷22×56÷56= 12÷(10×6﹣54)=
87+87÷87﹣87= 50×42×20= 970﹣174﹣326= 1250×80=
直接写出得数:
①578+216= ②18.25﹣3.3= ③3.2﹣0.02=
④25×8= ⑤2÷3= ⑥0.99×9+0.99=
⑦2 5×0.4= ⑧1×8+1×2= ⑨21÷7=
×40%+
×
×80%
+1.6÷10 (2)
÷
+
×
+
)×4+
(4)12.5﹣(8.5+0.625÷62.5%)
÷3=
×15= 3.14×8=
×75%=
+
×
=
÷
= 4×25%+16×25%= 1+2%=
×4×
=
÷26= 2﹣
=
+
﹣
)÷
﹣
)+
)].
﹣
③2÷
﹣
+
)+12.5.
×
﹣
÷
16×(
+
﹣
)
÷
×
÷
÷(
﹣
)×
.
②
+33.5+
﹣3.5 ③7.09﹣
+12.03﹣
.
+
×
(
+
﹣
)×30
×
+
÷
﹣
)×
.
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