Question

(7.2*2.4-9.48)/0.25简便运算？

Answer 1

(7.2*2.4-9.48)/0.25
=(7.2*2.4-9.48)/(1/4)
=4*(7.2*2.4-9.48)
=4*[7.2*(2.5-0.1)-9.48]
=4*(7.2*2.5-7.2*0.1-9.48)
=4*(1.8*4*2.5-0.72-9.48)
=4*[1.8*(4*2.5)-(0.72+9.48)]
=4*(1.8*10-10.2)
=4*(18-10.2)
=4*7.8
=4*(8-0.2)
=4*8-4*0.2
=32-0.8
=31.2

Answer 2

(7.2×2.4-9.48)÷0.25 =(7.2x2+7.2x0.4-9.48)x4 =(14.4+2.88-10+0.52)x4 =7.8x4 =31.2

Answer 3

2.4×7.2+3.7×2.4-2.4=2.4×（7.2+3.7-1）=2.4×9.9=2.4×（10-0.1）=2.4×10-2.4×0.1=24-0.24=23.76

Answer 4

解决这个问题的方案不止一个，我认为我想的这个方案并不能准确的解决你的问题，详细的答案还需要你自行思考。

Answer 5

(7.2×2.4-9.48)÷0.25 =(7.2x2+7.2x0.4-9.48)x4 =(14.4+2.88-10+0.52)x4 =7.8x4 =31.2