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222-9+11+12:2*14+14 = ? ( )

## Toán Lớp 6: Mấy bợn ơi , giúp mik bài này , do có nhìu pài qá nên mik nhát tính ý 3) 287 + 121 + 513 + 79 4) 17.34 + 17.39 + 2

Toán Lớp 6: Mấy bợn ơi , giúp mik bài này , do có nhìu pài qá nên mik nhát tính ý
3) 287 + 121 + 513 + 79
4) 17.34 + 17.39 + 27.17
5) 4. 52 – 64: 42
6) 25 . 101 – 25 .1010
7) 72 + [ 62 – ( 102 – 4 . 16 )]
8)
9) [120 : 4 – (23 -17) . 5]. 20212022

1. $\text{3/ 287 + 121 + 513 + 79}$ $\\$ $\text{= (287 + 513) + (121 + 79)}$ $\\$ $\text{= 1000 + 200}$ $\\$ $\text{= 1200}$ $\\$ $\text{4/ 17.34 + 17.39 + 27.17}$ $\\$ $\text{= 17. (34 + 39 + 27)}$ $\\$ $\text{= 17. 100}$ $\\$ $\text{= 1700}$ $\\$ $\text{5/ 4. 52 − 64 : 42}$ $\\$ $\text{= 208 − 1,52}$ $\\$ $\text{= 206,48}$ $\\$ $\text{6/ 25 . 101 – 25 .1010}$ $\\$ $\text{= 25. (101 – 1010)}$ $\\$ $\text{= 25. (-909)}$ $\\$ $\text{= -22725}$ $\\$ $\text{7/ 72 + [62 – ( 102 – 4 . 16 )]}$ $\\$ $\text{= 72 + [62 – (102 – 64)]}$ $\\$ $\text{= 72 + (62 – 38)}$ $\\$ $\text{= 72 + 24}$ $\\$ $\text{= 96}$

2. 3,
287+121+513+79
=(287+513)+(121+79)
=800+200
=1000
4,
17.34+17.39+27.17
=17.(34+29+27)
=17.(63+27)
=17.100
=1700
5,
4.52-64:42
=208-1,52
=206,48
6,
25.101-25.1010
=25.(101-1010)
=25.(-909)
=-22725
7,
72+[62-(102-4.16)]
=72+[62-(102-64)]
=72+[62-58]
=72+4
=76
9,
[120:4-(23-17).5].20212022
=(30-6.5).20212022
=(30-30).20212022
=0.20212022
=0