1.03×0.23 = (1 + 0.03) ×0.23 = 1×0.23 + 0.03×0.23 = 0.23 + 0.0069 = 0.2369
1.2×98 = 1.2×(100 - 2) = 1.2×100 - 1.2×2 = 120 - 2.4 = 117.6
1.03*0.23怎么简便运算就是用递等式,不能直接用竖式算,请用简便运算计算1.03*0.23.o(>_再帮忙做1.2
1.03×0.23 = (1 + 0.03) ×0.23 = 1×0.23 + 0.03×0.23 = 0.23 + 0.0069 = 0.2369
1.2×98 = 1.2×(100 - 2) = 1.2×100 - 1.2×2 = 120 - 2.4 = 117.6