77+2.7+2.7+25的简便算法是什么?
问题描述:
77+2.7+2.7+25的简便算法是什么?
答
77+23+2+2*2.7
=100+2*3.7
=107.4
77+2.7+2.7+25的简便算法是什么?
77+23+2+2*2.7
=100+2*3.7
=107.4