9/5×25%+1/4×2.2-0.25用简便方法怎么算?

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9/5×25%+1/4×2.2-0.25用简便方法怎么算?9/5×25%+1/4×2.2-0.25用简便方法怎么算?9/5×25%+1/4×2.2-0.25用简便方法怎么算?=1.8×0.25+0.2

9/5×25%+1/4×2.2-0.25用简便方法怎么算?
9/5×25%+1/4×2.2-0.25用简便方法怎么算?

9/5×25%+1/4×2.2-0.25用简便方法怎么算?
=1.8×0.25+0.25×2.2-0.25×1
=0.25×(1.8+2.2-1)
=0.25×3
=0.75