3) 6.9.24 + 21.32 + 3.55 5) 79.114 – 28.79 + 79.14 + 33 8) 80 – (4.5² – 3.2') : 38 11) (153.53 – 99.53 – 53²) : 53 + 1° 13) 3° : 36 + 2020° – (105 – 100)² 16) (37 + 16*).(4'º – 3").(3ª – 9') 19) 720 – {40.[(120 – 70) : 25 + 2°]} 21) 500 – {5[409 – (2'.3 – 21)']+10'}

`3) 6.9.24 + 21.32 + 3.55` 

`= (6.55).(9.3).(24.32)+21`

`= 330.27.768+21`

`= 6842880+21`

`= 6842901`

`5)  79.114 – 28.79 + 79.14 + 33`

`= 79.(114-28).(14+33)`

`=79.86.47`

`= 319318`

`8)80 – (4.5² – 3.2') : 38`

`= 80 - (4.25-3.8):38`

`= 80 - (100-24):38`

`= (80 - 76):38`

`= 38:4`

`= 9,5`

`11)(153.53 – 99.53 – 53²) : 53 + 1^0`

`= 153.(53-53)-(53.53²):99+1^0`

`= (153-53).(2809:99)+1`

`=(100.28,3)+1`

`= 2830+1`

`=2831`