脱式计算.(能简算的要简算) ①1.258×18.5-0.258×18.5 ②8.48÷0

2024-12-25 18:05:22
推荐回答(1个)
回答1:

①1.258×18.5-0.258×18.5,
=18.5×(1.258-0.258),
=18.5×1,
=18.5;

②8.48÷0.8×0.9,
=10.6×0.9,
=9.54;

③1.25×2.4,
=1.25×8×0.3,
=10×0.3,
=3;

④5.85÷(1.3+0.5)×6,
=5.85÷1.8×6,
=3.25×6,
=19.5.