280 : (9+1+4)*9=180г сахара
..............................................................
71-(28:4)=64
1)28:4=7
2)71-7=64
<span>1309:187</span>≈1309:200≈7
<span>Проверка:
187*7=1309
904:226</span>≈904:200≈4
<span>Проверка
226*4=904
2034:678</span>≈2034:700≈3
<span>Проверка
678*3=2034
4288:536</span>≈<span>4288:500</span>≈8
<span>Проверка
536*8=4288
870:145</span>≈870:150≈6
<span>Проверка
6*145=870
1566:261</span>≈<span>1566:250</span>≈6
Проверка
261*6=1566