2.5*13+0.9能简便运算吗?怎么算?(列式)
问题描述:
2.5*13+0.9能简便运算吗?怎么算?(列式)
答
2.5*13+0.9
=2.5*12+2.5+0.9
=2.5*4*3+3.4
=10*3+3.4
=30+3.4
=33.4