计算如下:2.5×2.76+0.124×25=2.5×2.76+1.24×2.5=2.5×(2.76+1.24)=2.5×4=10
简便计算如下:原式=2.5×2.76+2.5×1.24=2.5×(2.76+1.24)=2.5×4=10
25×0.276+0.124×25=25(0.276+0.124)=25×0.4=10