1) 45 + 27 / 3 - 12= 45 + 9 - 12= 54 - 12= 42
2) 100 - 10 * 9 - 8= 100 - 90 - 8= 10 - 8= 2
3) 17 3 + 2 10= 51 + 20= 71
4) 90 - 36 / 3 2= 90 - 12 2= 90 - 24= 66
5) 17 + 15 3 0= 17 + 0= 17
6) 80 - 5 * 2 / 10= 80 - 10 / 10= 80 - 1= 79
7) 84 / 4 3 + 2= 21 3 + 2= 63 + 2= 65
8) 5 * 5 + 75 / 5= 25 + 15= 40
9) 72 / 6 + 6 * 5= 12 + 30= 42
1) 45 + 27 / 3 - 12
= 45 + 9 - 12
= 54 - 12
= 42
2) 100 - 10 * 9 - 8
= 100 - 90 - 8
= 10 - 8
= 2
3) 17 3 + 2 10
= 51 + 20
= 71
4) 90 - 36 / 3 2
= 90 - 12 2
= 90 - 24
= 66
5) 17 + 15 3 0
= 17 + 0
= 17
6) 80 - 5 * 2 / 10
= 80 - 10 / 10
= 80 - 1
= 79
7) 84 / 4 3 + 2
= 21 3 + 2
= 63 + 2
= 65
8) 5 * 5 + 75 / 5
= 25 + 15
= 40
9) 72 / 6 + 6 * 5
= 12 + 30
= 42