(2.68-3.04)-(1.96-7.32)

问题描述:

(2.68-3.04)-(1.96-7.32)
8.6*5.7+4.3*4.3*2
9.9*10.1-9.9*0.1

1、原式=2.68-3.04-1.96+7.32
=2.68+7.32-(3.04+1.96)
=10-5
=5
2、原式=8.6×5.7+4.3×8.6
=8.6×(5.7+4.3)
=8.6×10
=86
3、原式=9.9×(10.1-0.1)
=9.9×10
=99