简算 (0.125-0.25÷4×0.25)÷0.5
问题描述:
简算 (0.125-0.25÷4×0.25)÷0.5
答
口算即可,结果是7/32
答
(0.125-0.25÷4×0.25)÷0.5
= (1/8 -1/4 x 1/4 ×1/4 )x2
= ( 1/8 - 1/ 64 ) x 2
= 1/8 x 2 - 1/64 x 2
= 1/4 - 1/ 32
= ( 8-1) /32
= 7/ 32
32分之7