6.8×3.2+3.2×6.8简便算法脱式计算

6.8×3.2+3.2×6.8简便算法脱式计算 急!急! 急 !急!
2024-11-28 21:57:56
推荐回答(1个)
回答1:

6.8×3.2+3.2×6.8
=2×6.8×3.2
=6.8×6.4
=(6.6+0.2)×(6.6-0.2)
=6.6²-0.2²
=43.56-0.04
=43.52

(题是否有误?)