3.8×5.46+7.2×5.46-5.46怎样简算?4.6×2.02怎样简算?
问题描述:
3.8×5.46+7.2×5.46-5.46怎样简算?4.6×2.02怎样简算?
答
3.8×5.46+7.2×5.46-5.46
=5.46×(3.8+7.2-1)
=5.46×10
=54.6;
4.6×2.02
=4.6×(2+0.02)
=9.2+0.092
=9.292