Вычисли удобным способом: 87 ⋅ 64+87 ⋅ 36 39 ⋅ 16+39 ⋅ 4 96 ⋅ 77-96 ⋅ 76 48 ⋅ 61-40 ⋅ 61 24 ⋅ 49+24 34 ⋅ 21-34

Вычисляем удобным способом:

1) 87 ⋅ 64+87 ⋅ 36 = 87 ⋅ (64 + 36) = 87 ⋅ 100 = 8700

2) 39 ⋅ 16+39 ⋅ 4 = 39 ⋅ (16 + 4) = 39 ⋅ 20 = 780

3) 96 ⋅ 77-96 ⋅ 76 = 96 ⋅ (77 - 76) = 96 ⋅ 1 = 96

4) 48 ⋅ 61-40 ⋅ 61 = 61 ⋅ (48 - 40) = 61 ⋅ 8 = 488

5) 24 ⋅ 49+24 = 24 ⋅ (49 + 1) = 24 ⋅ 50 = 1200

6) 34 ⋅ 21-34 = 34 ⋅ (21 - 1) = 34 ⋅ 20 = 680