5.75 /0.25 + 4.24 ×4
= 5.75 ×4 + 4.24 ×4
= (5.75 + 4.24) ×4
= 9.99 ×4
= (10-0.01) ×4
= 40 - 0.04
= 39.965.75乘4是设么意思5.75 /0.25=5.75 /(1/4) = 5.75×4看明白吗？Thank you!