Question

2.55×32-17.28÷3.6的简便计算？

Answer 1

2.55×32-17.28÷3.6
=2.55×2×16-17.28÷3.6
=(2+0.55)×2×16-17.28÷3.6
=(4+1.1)×16-17.28÷3.6
=5.1×16-17.28÷3.6
=(5+0.1)×16-17.28÷3.6
=5×16+0.1×16-17.28÷3.6
=80+1.6–17.28÷3.6
=81.6-17.28÷(2×2×0.9)
=81.6-17.28÷2÷2÷0.9
=81.6-8.64÷2÷0.9
=81.6-4.32÷0.9
=81.6-4.32÷(9/10)
=81.6-4.32×10÷9
=81.6-43.2÷9
=81.6-(36+7.2)÷9
=81.6-36÷9-7.2÷9
=81.6-4-0.8
=77.6-0.8
=76.8

Answer 2

2.55×32-17.28÷3.6
= 2.55×32-172.8/36
= 2.55×32-32×5.4/36
= 2.55×32-32×5.4/36
= 2.55×32-32×0.15
= 32×(2.55-0.15)
= 32×2.4
= 32×2.5 - 32×0.1
= 80 - 3.2
= 76.8

Answer 3

2.55×32-17.28÷3.6
=(2.5+0.05)*4*8-172.8/36
=(2.5*4+0.05*4)*8-(4*43.2)/36
=10.2*8-43.2/9
=81.6-4.8
=81.6-5+0.2
=76.8