(7.88+6.77+5.66)×(9.31+10.98+10)—(7.88+6.77+5.66+10)×(9.31+10.
问题描述:
(7.88+6.77+5.66)×(9.31+10.98+10)—(7.88+6.77+5.66+10)×(9.31+10.
答
=10×(7.88+6.77+5.66)-10×(9.31+10.98)
=203.1-202.9
=0.2