用简便方法计算.5分之4×4+5分之2×2+5分之1×16.
问题描述:
用简便方法计算.5分之4×4+5分之2×2+5分之1×16.
答
4/5×4+2/5×2+1/5×16
=1/5×16+1/5×4+1/5×16
=1/5×(16+4+16)
=1/5×36
=36/5