1,40-[6-(5-1)] 2, 4.3+[8-(2+3)] 3, 36:{46-[4.(17-7)]} 4,2.{19+[12:(8-4)]+5} 5, 12:{18:[9-(4+2)]} 6, 40:{5.[10-(6+3)]} 7, 25.{16:[12-4+4.(4.2)]} 8, 3.[(15.2):(5+5.2)] 9, 30:{15:[8-(1+2)]} 10 15-{15:[6-(1+2)]}

Đáp án :

1) `40-[6-(5-1)]`

`=` `40 - [6 - 4]`

`=` `40 - 2`

`=` `38`

2) `4.3+[8-(2+3)]`

`=` `12 + [8 - 5]`

`=` `12 + 3`

`=` `15`

3) `36:{46-[4.(17-7)]}`

`=``36 : {46 - [4 . 10]}`

`=` `36 : {46 - 40}`

`=``36 : 6`

`=` `6`

4) `2.{19+[12:(8-4)]+5}`

`=` `2. {19 + [12 : 4] + 5}`

`=` `2. {19 + 3 + 5}`

`=` `2.27`

`=` `54`

5) `12:{18:[9-(4+2)]}`

`=` `12 : {18 : [9 - 6]}`

`=` `12 : {18 : 3}`

`=` `12 : 6`

`= 2`

6) `40:{5.[10-(6+3)]}`

`=` `40 : {5. [10 - 9]}`

`=` `40 : {5.1}`

`=` `40 : 5`

`=` `8`

7) `25.{16:[12-4+4.(4.2)]}`

`=` `25. {16:[12 - 4 + 4. 8]}`

`=` `25. {16 : [12 - 4 + 32]}`

`=` `25. {16:40}`

`=` `25 .` `2/5`

`=` `10`

8) `3.[(15.2):(5+5.2)]`

`=` `3. [30 : (5 + 10)]`

`=` `3. [30 : 15]`

`=` `3.2`

`=` `6`

9) `30:{15:[8-(1+2)]}`

`=` `30:{15:[8-3]}`

`=` `30:{15:5}`

`=` `30 : 3`

`=` `10`

10) `15-{15:[6-(1+2)]}`

`=` `15-{15:[6-3]}`

`=` `15-{15:3}`

`=` `15 - 5`

`=` `10`

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