3. 0 · 15 1 · (30 – 23) 40 – 39 + 18 4. 1 · 38 ○ 1 + 38 0 · 41 ○ 0 + 41 7 · 4 ○ 7 + 7 + 7 6 · 3 ○ 6 + 6 + 6

Решение:

3.

• 0 \(\cdot\) 15 = 0
• 1 \(\cdot\) (30 - 23) = 1 \(\cdot\) 7 = 7
• 40 - 39 + 18 = 1 + 18 = 19

4.

• 1 \(\cdot\) 38 = 38 1 + 38 = 39 38 < 39

1 \(\cdot\) 38 < 1 + 38

• 0 \(\cdot\) 41 = 0 0 + 41 = 41 0 < 41

0 \(\cdot\) 41 < 0 + 41

• 7 \(\cdot\) 4 = 28 7 + 7 + 7 = 21 28 > 21

7 \(\cdot\) 4 > 7 + 7 + 7

• 6 \(\cdot\) 3 = 18 6 + 6 + 6 = 18 18 = 18

6 \(\cdot\) 3 = 6 + 6 + 6

Ответ: 3. 0 \(\cdot\) 15 = 0, 1 \(\cdot\) (30 - 23) = 7, 40 - 39 + 18 = 19; 4. 1 \(\cdot\) 38 < 1 + 38, 0 \(\cdot\) 41 < 0 + 41, 7 \(\cdot\) 4 > 7 + 7 + 7, 6 \(\cdot\) 3 = 6 + 6 + 6.

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