一、 (9.3×9/16-7.3×9/16)÷9/4二、1/5×37%+0.63×20%+43

问题描述:

一、 (9.3×9/16-7.3×9/16)÷9/4二、1/5×37%+0.63×20%+43

(9.3×9/16-7.3×9/16)÷9/4
=9/16×(9.3-7.3)÷9/4
=9/16×2×4/9
=1/2
1/5×37%+0.63×20%+43
=1/5×(37%+0.63)+43
=1/5×1+43
=0.2+43
=43.2