脱式计算.(能简算的要简算)(1)1.25×8.37×0.8 (2)(9-2.35)×0.64 (3)0.25×32×12.5(4)0.1

2024-11-09 02:07:52
推荐回答(1个)
回答1:

(1)1.25×8.37×0.8
=1.25×0.8×8.37,
=1×8.37,
=8.37;

(2)(9-2.35)×0.64
=6.65×0.64,
=4.256;

(3)0.25×32×12.5
=(0.25×4)×(8×1.25),
=1×10,
=10;

(4)0.15×1999+0.15
=(1+1999)×0.15,
=2000×0.15,
=300;

(5)0.37×1.4-0.4×0.37
=(1.4-0.4)×0.37,
=1×0.37,
=0.37;

(6)8.7×9.9
=8.7×(10-0.1),
=8.7×10-8.7×0.1,
=87-0.87,
=86.13.