来自高丕发的问题
【脱式计算.51.8-4.8×(2.03-0.18)12-1.25×635.4×0.29-0.29×25.448×0.69+3.1×4.8.】
脱式计算.
51.8-4.8×(2.03-0.18)
12-1.25×6
35.4×0.29-0.29×25.4
48×0.69+3.1×4.8.
1回答
2020-05-24 14:57
【脱式计算.51.8-4.8×(2.03-0.18)12-1.25×635.4×0.29-0.29×25.448×0.69+3.1×4.8.】
脱式计算.
51.8-4.8×(2.03-0.18)
12-1.25×6
35.4×0.29-0.29×25.4
48×0.69+3.1×4.8.
(1)51.8-4.8×(2.03-0.18),
=51.8-4.8×1.85,
=51.8-8.88,
=42.92;
(2)12-1.25×6,
=12-7.5,
=4.5;
(3)35.4×0.29-0.29×25.4,
=(35.4-25.4)×0.29,
=10×0.29,
=2.9;
(4)48×0.69+3.1×4.8,
=4.8×6.9+3.1×4.8,
=(6.9+3.1)×4.8,
=10×4.8,
=48.