2.5*13+0.9能简便运算吗?怎么算?(列式)
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2.5*13+0.9能简便运算吗?怎么算?(列式)
2.5*13+0.9能简便运算吗?怎么算?(列式)
2.5*13+0.9能简便运算吗?怎么算?(列式)
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
2.5*13+0.9能简便运算吗?怎么算?(列式)
2.5*13+0.9能简便运算吗?怎么算?(列式)
2.5*13+0.9能简便运算吗?怎么算?(列式)
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