Question

(-6/5)-(-72/5)-121/3-(-4.2)等于多少初一,混合运算？

Answer 1

(-6/5)-(-72/5)-121/3-(-4.2)
=-6/5+72/5-121/3+4.2
=-6/5+72/5+21/烂扒5-121/局悄3
= (-6+72+21)/5-121/3
= 87/5-121/3
=17又2/桐历渣5-40又1/3
=-(40又5/15-17又6/15)
=-22又14/15

Answer 2

原局手式＝-6/5+72/5-121/3+4.2
＝66/5-121/3+4.2
＝桐迅嫌198/15-605/15+4.2
＝-407/15+4.2
＝-407/15+42/10
＝-814/30+126/30
＝-688/30
≈22.93(保留两昌段位小数)

Answer 3

原式
=（72/5-6/5+21/5）-40又1/3
=67/5一40又1/3
=13又散宴2/5一40又1/3
=一册告（39又20/15一13又6/15）
=-26又州掘明7/15