脱式计算(能简算的要简算)0.75×4×0.25×4 9.6+9.9×99

2024-11-22 21:25:44
推荐回答(1个)
回答(1):

①0.75×4×0.25×4,
=0.75×(4×0.25)×4,
=0.75×1×4,
=3;

②9.6+9.9×99,
=9.6+980.1,
=989.7;

③15.58÷8.2-0.72,
=1.9-0.72,
=1.18;

④4.536÷0.8÷14,
=5.67÷14,
=0.405;

⑤2.8×3.6+1.4×2.8,
=(3.6+1.4)×2.8,
=5×2.8,
=14;

⑥6.3×10.1,
=6.3×(10+0.1),
=6.3×10+6.3×0.1,
=63+0.63,
=63.63.