1.234-0.76=
132.8+3.64= 1.54×2.5=
7.28×50= 80.4×0.35= 0.056×0.15=
2、先观察,能用简便算法的用简便算法计算.
4.9+0.1-4.9+0.1 34.02+13.5+0.98 5.6
5.17-1.8-3.2 9.95-(4.95+3.14)0.13
+2.7-4.4 8.43+2.87+0.57+