3 运动定律与简便运算
脱式计算,能简算的要简算.
2.72÷[(8.2﹣6.5)×0.5];
9.12+9.12×9﹣60.2;
28.4÷0.4÷0.25;
27.36﹣27.36÷7.6.
怎样简便就怎样算.
9.4+0.3﹣6.4 15.25+4.72+4.75+5.28 34.823﹣(4.82+15.2)
12.7﹣4.8﹣5.2 3.1+25.78+6.9 73.8﹣1.64﹣13.8﹣5.36.
脱式计算.(能简算的要简算)
12.56﹣6.64﹣3.36
45.5﹣(0.98+5.5)13.6+7.94+6.4
15.19+3.36+4.64+4.81.
脱式计算,能简便的要用简便方法计算.
0.389×4×0.25 4.02×3.02+4.02×6.98
4.05÷0.81+2.4 65.4÷2.5÷4
86×9.9 1.76﹣[(0.74+0.26)÷0.8].
脱式计算(能简算的要用简算)
14.6﹣4.6×2.8 12.5×0.4×2.5×8 4.2×1.25+4.8×1.25﹣1.25
5.96+13×(3.2﹣3.12) 13.5×102 0.17×40+0.017×600+1.7×10.
能简便的要简便:
(1)[10﹣(8.4﹣5)]÷0.5
(2)14.2×0.7+0.3×14.2
(3)5.7×(3.6+6.4)
(4)7.2÷4.5÷2
(5)0.8×9×200.6+7×0.4×200.6.
计算:
7.5×46.7+52.3×7.5+7.5; (++﹣)×24; (2.5﹣2.5×0.6)÷0.4;
﹣(+2.4×)÷; 1.2+[2÷(2﹣2.4×)]; =.
计算下面各题,怎样简便就怎样算.
(1)45.36÷7.2﹣2.5×0.2 (2)5.12﹣(4.65﹣4.88)
(3)2.7÷4+6.3×0.5 (4)9.43×1.1
(5)0.25×12.5×3.2 (6)30.8×0.35+6.5×3.08.
计算下面各题,能用简便算法的用简便算法
3.045+2.7×6.9= 18.94﹣2.5×4=
3.65×2.8+3.65×7.2= 13.54×102﹣2×13.54=