脱式计算.(能简算的要简算)1375+450÷18×25 4.05-2.86-0.14 75×60%+24×35

2024-11-08 22:37:33
推荐回答(1个)
回答(1):

①1375+450÷18×25,
=1375+25×25,
=1375+625,
=2000;

②4.05-2.86-0.14,
=4.05-(2.86+0.14),
=4.05-3,
=1.05;

③75×60%+24×

3
5
+0.6,
=75×0.6+24×0.6+0.6,
=0.6×(75+24+1),
=0.6×100,
=60;

④31.9×18-8×31.9,
=31.9×(18-8),
=31.9×10,
=319.