4 Выполни умножение. Рассуждай вслух. 50 · 30 700 · 60 140 · 70 320 · 30 380 · 200 150 · 600

Ответ: 1500, 42000, 9800, 9600, 76000, 90000

1. 50 \(\cdot\) 30 = 5 \(\cdot\) 3 \(\cdot\) 10 \(\cdot\) 10 = 15 \(\cdot\) 100 = 1500
2. 700 \(\cdot\) 60 = 7 \(\cdot\) 6 \(\cdot\) 100 \(\cdot\) 10 = 42 \(\cdot\) 1000 = 42000
3. 140 \(\cdot\) 70 = 14 \(\cdot\) 7 \(\cdot\) 10 \(\cdot\) 10 = 98 \(\cdot\) 100 = 9800
4. 320 \(\cdot\) 30 = 32 \(\cdot\) 3 \(\cdot\) 10 \(\cdot\) 10 = 96 \(\cdot\) 100 = 9600
5. 380 \(\cdot\) 200 = 38 \(\cdot\) 2 \(\cdot\) 10 \(\cdot\) 100 = 76 \(\cdot\) 1000 = 76000
6. 150 \(\cdot\) 600 = 15 \(\cdot\) 6 \(\cdot\) 10 \(\cdot\) 100 = 90 \(\cdot\) 1000 = 90000

Ответ: 1500, 42000, 9800, 9600, 76000, 90000