请问答案怎么算？
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58.7×0.41-0.41×8.7=0.41×（58.7-8.7）=0.41×50=20.5
3.92×10.3-3.92×0.3=3.92×（10.3-0.3）=3.92×10=39.2
8.22-8.2+1.78=8.22+1.78-8.2=10-8.2=1.8
6.46-3.4+3.54-4.6=6.46+3.54-3.4-4.6=（6.46+3.54）-（3.4+4.6）=10-8=2
4.46×3.09+3.09×95.54=3.09×（4.46+95.54）=3.09×100=309
125×40=125×8×5=1000×5=500
9.69×3.79+3.79×0.31=3.79×（9.69+0.31）=3.79×10=37.9
3.09×99+3.09=3.09×（99+1）=3.09×100=309
75.54-10.05-46.95=75.54-（10.05+46.95）=75.54-57=18.54
0.83+1.06+8.94=0.83+（1.06+8.94）=0.83+10=10.83
49.7×0.27+0.27×4.97=4.97×0.27×10+0.27×4.97=4.97×0.27×(10+1)=4.97×0.27×11=14.7609
25×16×125=25×2×8×125=（25×2）×（8×125）=50×1000=50000
3.92×10.3-3.92×0.3=3.92×（10.3-0.3）=3.92×10=39.2
8.22-8.2+1.78=8.22+1.78-8.2=10-8.2=1.8
6.46-3.4+3.54-4.6=6.46+3.54-3.4-4.6=（6.46+3.54）-（3.4+4.6）=10-8=2
4.46×3.09+3.09×95.54=3.09×（4.46+95.54）=3.09×100=309
125×40=125×8×5=1000×5=500
9.69×3.79+3.79×0.31=3.79×（9.69+0.31）=3.79×10=37.9
3.09×99+3.09=3.09×（99+1）=3.09×100=309
75.54-10.05-46.95=75.54-（10.05+46.95）=75.54-57=18.54
0.83+1.06+8.94=0.83+（1.06+8.94）=0.83+10=10.83
49.7×0.27+0.27×4.97=4.97×0.27×10+0.27×4.97=4.97×0.27×(10+1)=4.97×0.27×11=14.7609
25×16×125=25×2×8×125=（25×2）×（8×125）=50×1000=50000
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