a) 85 ÷ 5 + 3 × 15 - 50
17 + 45 - 50
62 - 50
[tex] \sf\blue{12 }[/tex]
b) (7 × 7 + 5) ÷ (18 - 15 ÷ 3 + 5) × 2
(49 + 5) ÷ (18 - 5 + 5) × 2
54 ÷ 18 × 2
3 × 2
[tex] \sf\red{6 }[/tex]
c) (30 - 5 × 6) ÷ (7 + 2 × 10) × (40 - 3 + 5)
(30 - 30) ÷ (7 + 20) × (37 + 5)
0 ÷ 27 × 42
0 × 42
[tex] \sf\purple{ 0}[/tex]
d) 2 + 30 ÷ 5 + (9 × 6 - 4) ÷ 5 - (40 ÷ 10 + 3)
2 + 6 + (54 - 4) ÷ 5 - (4 + 3)
2 + 6 + 50 ÷ 5 - 7
2 + 6 + 10 - 7
18 - 7
[tex] \sf\green{ 11}[/tex]
