1. 计算

3 × 4 + 3 =          2 × 8 – 2 =      2×5 + 2 =       3 × 8 – 3 =

6 × 3 – 6 =          5 × 4 – 5 =      7 ×2 + 2 =      5 × 4 – 5 =