3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)
=3+1/4+2+1/5+4+7/10-(2+1/4-1-5/6)
=3+1/4+2+1/5+4+7/10-2-1/4+1+5/6
=(3+2+4-2+1)+(1/4-1/4)+(1/5+7/10)+5/6
=8+9/10+5/6
=8+26/15
=9又15分之11
但愿没有算错数.
3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)
=3+1/4+2+1/5+4+7/10-(2+1/4-1-5/6)
=3+1/4+2+1/5+4+7/10-2-1/4+1+5/6
=(3+2+4-2+1)+(1/4-1/4)+(1/5+7/10)+5/6
=8+9/10+5/6
=8+26/15
=9又15分之11
但愿没有算错数.