3.2×2.8+1.57能简算吗

3.2×2.8+1.57能简算吗
2025-06-28 17:17:13
推荐回答(1个)
回答1:

3.2×2.8+1.57
=(3+0.2)x(3-0.2)+1.57
=9-0.04+1.57
=10.53