下面各题怎样简便就怎样算.①4×0.8×2.5×12.5②(2.8+3.85÷3.5)×4

2024-12-03 18:26:31
推荐回答(1个)
回答1:

①4×0.8×2.5×12.5,
=(4×2.5)×(0.8×12.5),
=10×10,
=100;

②(2.8+3.85÷3.5)×4.6,
=(2.8+1.1)×4.6,
=3.9×4.6,
=17.94.