（1）4.05÷0.5+10.75
=8.1+10.75
=18.85
（2）6.8×2.7+2.7×3.2
=（6.8+3.2）×2.7
=10×2.7
=27
（3）0.38×102
=0.38×（100+2）
=0.38×100+0.38×2
=38+0.76
=38.76
（4）70.3-17.48÷7.6
=70.3-2.3
=68
（5）0.125×0.6×80
=0.125×80×0.6
=10×0.6
=6
（6）8.5×1.2÷3.4
=10.2÷3.4
=3
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