计算下面各题,能简算要简算. 375+450÷18×25(115+217)×15×175.3÷43+0.75×5.7-75%1.25×3.2×2.5

2025-03-03 08:56:38
推荐回答(1个)
回答1:

(1)375+450÷18×25
=375+25×25
=375+625
=1000;

(2)(
1
15
+
2
17
)×15×17
=
1
15
×15×17+
2
17
×15×17
=17+30
=47;

(3)5.3÷
4
3
+0.75×5.7-75%
=(5.3+5.7-1)×0.75
=10×0.75
=7.5;

(4)1.25×3.2×2.5
=(1.25×8)×(0.4×2.5)
=10×1
=10.