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!
是
43×6.9+6.9×5.7
答
43*6.9+6.9*5.7
=6.9*(43+5.7)
=(7-0.1)*48.7
=340.9-4.87
=336.03
答
354.03
答
6.9*(43+5.7)
=6.9*48.7
=336.03
答
4.3×6.9+6.9×5.7
=(4.3+5.7)×6.9
=10×6.9
=69