0.125×3.2×8=﹙0.125×8﹚×3.2=1×3.2=3.2;
7.6÷(3.8÷3.5)=7.6÷3.8×3.5=2×3.5=7;
3.7×0.99=3.7×﹙1-0.01﹚=3.7-0.037=3.663.