递等式计算(能简算的要简要).(1)12.5×6.4×2.5×0.5(2)10.1-10.1÷1.01(3

2025-04-08 04:47:43
推荐回答(1个)
回答1:

(1)12.5×6.4×2.5×0.5,
=12.5×8×0.4×2×2.5×0.5,
=(12.5×8)×(0.4×2.5)×(2×0.5),
=100×1×1,
=100;

(2)10.1-10.1÷1.01,
=10.1-10,
=0.1;

(3)0.19×2.8+0.81×2.8,
=(0.19+0.81)×2.8,
=1×2.8,
=2.8;

(4)22.32÷[100÷(12.5+7.5)],
=22.32÷[100÷20],
=22.32÷5,
=4.464.