3 运动定律与简便运算
64×2.5×0.125 3×0.8+3×2.2 3.76÷0.4÷2.5
(14.21+3.5)÷7 4.66×0.28+4.66×0.82﹣4.66 2.4+57.6÷36.
(1)3.72×3.5+62.8×0.35
(2)9.9×8.6+0.86
(3)15.02﹣6.8﹣1.02﹣3.2
(4)725÷0.125÷0.25÷32
(5)8888888×77777777÷1111111÷2222222﹣9999999÷3333333.
计算.
1.8×[24.15÷(10.04﹣6.54)]=
5(x﹣1.6)=41×0.5=
3.42×4.7+0.83×34.2﹣3.42×3=
0.8+9.8+99.8+999.8+9999.8=
1.59×1.9+0.41×1.9﹣1.9
18.6﹣[12﹣0.328×(18.3+6.7)]
63÷[6.5×(3.4﹣3.32)+2.98]
96.12÷[(7﹣6.46)×(43.6+56.4)]
[49.84﹣(53.17﹣14.56)÷27]÷0.47.
×125××8 ++×24 ×(﹣)÷
3÷+3÷ 7+8.9+2+6.1 0.36×101
20﹣(5.6+4.8)÷1.3 3.2×(2.15+1.95÷6.5) (+)÷+
36×(+﹣)
简便计算,写出简便过程
(1)54×303
(2)7.7×0.73
(3)26.39×36+2.639×830﹣263.9×1.9
(4)272.4×6.2+2724×0.38
(5)2.04×0.25×7.2×12.5.
请运用简便方法计算.
(1)5.7×1.4+1.4×4.3 (2)9.05﹣3.86﹣3.14 (3)6.84×10.1
(4)87×2.5+8.7×75 (5)1+2+3+4+5+6+…+97+98+99 (6)0.7777×0.7+0.1111×5.1.
脱式计算,能简算的要简算
9﹣1.9×(4.7﹣4.5) 8.65﹣3.7+1.35﹣6.3
1.2+36÷[20×(0.1﹣0.05)] (16.5×3+3×7.5)÷6.
38.5×7.4+38.5×2.6 92.85﹣12.65﹣7.65+7.15 800﹣7.06×99﹣7.06
(48.5﹣15)×4.5+66.4×4.5 2004× (+)×15×17.
计算(写出计算过程,能简算的要简算)
2﹣(6÷0.5﹣3×3)÷5+5×0.8 4×(+﹣)÷
1.25×3.45×6.789+3.75×1.15×1.211 .
直接写出下面各题的得数:
(1)175%+= (2)10÷10%= (3)﹣÷4= (4)+×=
(5)1×+÷= (6)= (7)(9.9+)÷0.9= (8)0.9+99×0.9=
(9)×÷×= (10)(9.3×﹣7.3)÷=