6. 40 – 6 = 34 34 ÷ 2 = 17
7. 75 – 17 = 58 58 ÷ 2 = 29
8. 3 + 7 = 10 10 × 2 = 20 20 – 8 = 12
12×10=120
9. 140 – 20 = 120 120÷20=6
10. 65 + 5 =70 70×5=350
6. 40 – 6 = 34 34 ÷ 2 = 17
7. 75 – 17 = 58 58 ÷ 2 = 29
8. 3 + 7 = 10 10 × 2 = 20 20 – 8 = 12
12×10=120
9. 140 – 20 = 120 120÷20=6
10. 65 + 5 =70 70×5=350