计算.2.33×5×40.3×0.6×243.65﹣2.2×1.13.7×0.15+4.025.2+3.8×0.934.7×3.5﹣0.2.
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4.95×99+4.95.
用简便方法计算:(1)19+199+1999+19999+199999(2)2367﹣(482+1367)(3)56×125(4)600÷8÷5(5)1994﹣1993+1992﹣1991+1990﹣1989.
计算34+77+66.
计算:59+18+41.