1. 4/25 · 8000 = 8000 : 25 · 4 = 1280
2. 1/2 · 20 = 20 : 2 = 10
3. 1 ц = 100 кг
10/20 · 100 = 100 : 20 · 10 = 50 (кг)
10/20 = 1/2 - сократили на 10
1/2 · 100 = 100 : 2 = 50 (кг)
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1. 4/25 · 8000 = 8000 : 25 · 4 = 1280
2. 1/2 · 20 = 20 : 2 = 10
3. 1 ц = 100 кг
10/20 · 100 = 100 : 20 · 10 = 50 (кг)
10/20 = 1/2 - сократили на 10
1/2 · 100 = 100 : 2 = 50 (кг)