急需100道脱式简便计算题带答案和过程

（1）0.68×1.9+0.32×1.9

=(0.68+0.32)x1.9

=1x1.9

=1.9

（2）10.15-10.75×0.4-5.7

=10.15-4.3-5.7

=10.15-(4.3+5.7)

=10.15-10

=0.15

（3）5.8×（3.87-0.13）+4.2×3.74

=5.8x3.74+4.2x3.74

=(5.8+4.2)x3.74

=10x3.74

=37.4

（4）32.52-（6+9.728÷3.2）×2.5

=32.52-(6+3.04)x2.5

=32.52-9.02x2.5

=32.52-22.55

=9.97

（5）（136+64）×（65-345÷23）

=200x(65-15)

=200x50

=10000

（6）0.4×125×25×0.8

=(0.4×25)×(125×0.8)

=10×100

=1000

（7）1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

（8）9123-(123+8.8)

=9123-123-8.8

=9000-8.8

=8991.2。