六年级脱式计算及答案
答:2/5X99十2/5 =2/5X(99+1) =2/5Ⅹ100 =40 50%Ⅹ48十1/2X152 =1/2X48十1/2X152 =1/2x(48十152) =1/2㐅200 =100 1.25㐅32X0.25 =1.25X8X4✘0.25 =(1.25X8)x(0.25X4) =10㐅1 =10 1/8x(32十72) =1/8x32十1/8Ⅹ72 =4十9 =13。 … = 回答，一个数除以几个数的积，可以用这个数依次除以积的几个因数商不变...
答:2/5X99十2/5 =2/5X(99+1) =2/5Ⅹ100 =40 50%Ⅹ48十1/2X152 =1/2X48十1/2X152 =1/2x(48十152) =1/2㐅200 =100 1.25㐅32X0.25 =1.25X8X4✘0.25 =(1.25X8)x(0.25X4) =10㐅1 =10 1/8x(32十72) =1/8x32十1/8Ⅹ72 =4十9 =13。 … = 回答，一个数除以几个数的积，可以用这个数依次除以积的几个因数商不变...