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

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

6. 34 ⋅ 21 − 34 = 34 ⋅ 21 − 34 ⋅ 1 = 34 ⋅ (21 − 1) = 34 ⋅ 20 = 680

Ответы:

• 87⋅64+87⋅36 = 8700
• 39⋅16+39⋅4 = 780
• 96⋅77-96⋅76 = 96
• 48⋅61-40⋅61 = 488
• 24⋅49 +24 = 1200
• 34⋅21-34 = 680