000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000biết
Số tạ xi măng bán đi là :
20:100x48,5=9,7 (tạ)
Số tạ xi măng còn lại là :
20 - 9,7 = 10,3 (tạ)
Đáp số : 10,3 tạ