怎么算简便就怎么算． 0.25×9.87×4 9.9×5.6 8.45-3.14-1.86 76.3×27-76.3×17．

（1）0.25×9.87×4=0.25×4×9.87=1×9.87=9.87；（2）9.9×5.6=（10-0.1）×5.6=10×5.6-0.1×5.6=56-0.56．=55.44；（3）8.45-3.14-1.86=8.45-（3.14+1.86）=8.45-5=3.45；（4）76.3×27-76.3×17=76.3×（27-17...