43×6.9+6.9×5.7的简便计算谁知道,尽快答复我,我还等着做题呢!是 43×6.9+6.9×5.7

问题描述:

43×6.9+6.9×5.7的简便计算谁知道,尽快答复我,我还等着做题呢!

43×6.9+6.9×5.7

43*6.9+6.9*5.7
=6.9*(43+5.7)
=(7-0.1)*48.7
=340.9-4.87
=336.03

354.03

6.9*(43+5.7)
=6.9*48.7
=336.03

4.3×6.9+6.9×5.7
=(4.3+5.7)×6.9
=10×6.9
=69