2/11+9/11乘以(3.2+2又34/35) 4/5除以5+5除以4/5乘以4/15 （1.8+2/9乘以3又3/4）+2又19/30 全都简便计算

急啊 请快点啊

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无简便算法
2/11+9/11乘以(3.2+2又34/35)
＝2/11+9/11(3+1/5+3-1/35)
=2/巧祥嫌11+9/11(6+6/35)
=2/11+54/11+54/385
=56/11+54/385
=2014/385
=5+89/385
4/5除以5+5除以4/宴悉5乘以4/15
=(4/5)/5+[5/(4/5)](4/15)
=4/25+5(4/15)/(4/5)
=4/25+(4/3)(5/4)
=4/25+5/3
=137/75
=1+62/75
（1.8+2/9乘孝手以3又3/4）+2又19/30
=1+4/5+(2/9)(15/4)+2+19/30
=1+4/5+5/6+2+19/30
=3+24/30+25/30+19/30
=3+68/30
=3+2+4/15
=5+4/15

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2/闹念11+9/11(3.2+2+34/35)
=2/11+9/11(3+1/5+2+34/35)
=1/11(2+9(5+1/5+34/35))
=1/11·2014/35
=2014/385

4/5/5+5/(4/5)4/笑弯陵15
=4/25+5/3
=137/25

(1.8+2/9(3+3/4))+2+19/30
=9/5+5/6+79/碰戚30
=79/15

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第一题=2.307002801

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