3 运动定律与简便运算
选用合适的方法计算:
6.02+3.6+1.98 1.29+3.7+2.71+6.3 3.07﹣0.38﹣1.62
3.25+1.79﹣0.59+1.75 7.5+4.9﹣6.1 14.8+7.9﹣4.8.
用递等式计算.(写出必要的计算过程,能简便的用简便方法计算)
(9.4﹣5.8)×2.07 12.54﹣4.56﹣3.44﹣1.54
(9.36×5+9.36+9.36×2)×1.25 7.236÷0.18﹣14.3×0.02.
计算,能简算的要简算
10÷0.2÷2.5 8.4÷0.21÷0.5 1.25×3.2×0.25
14.5×102 14.64+3.7×2.8 3.5×0.7+7.5×0.7﹣0.7.
7.85﹣4.7+2.15﹣4.3
193.2÷6.9﹣1.9×2.5
1.25×3.2×2.5×4.9
4.97×4.97+4.97×4.03+4.97
(3.12+0.9)÷(8.5﹣5×1.1)
[5+(17.9﹣1.74÷0.6)]×8.5.
递等式计算.(能简算的要简算)
9.6÷0.4×0.25 29.7÷(5.85÷0.65)
7.4×9.9 3.84﹣2.7×0.64
8.68﹣8.68÷0.56×0.5 4.7×4.7+4.7+4.3×4.7.
递等式计算(能简算的要简便计算).
3.6÷(3.6+1.2), 26.18÷(5.2﹣3.5)+0.06 (31.6﹣11.7)÷2.5÷0.4
[11÷(1﹣0.8)]÷0.1 20.12×48﹣201.2×1.4+2012×0.66.
脱式计算,能简算的必须简算.
12.5×0.25×320 4.57×0.36+4.57×0.64 103×2.4
78.6÷12.5÷0.8 48×0.25×5 15.72÷(3.8﹣3.2×0.75)
怎样简便就怎样计算.
4.98+8.02×2.5 60.8﹣40.8÷2.5 0.8×69.6×12.5
4.98×99+4.9 6.48÷3.2÷2.5 1.2×7.6+7.6×6.8.
选用合适的方法计算:
7.5﹣(5.5+1.24) 0.26+15.68+9.74+2.32 13.26+9.55﹣3.26 6.1+3.9﹣6.1+3.9.