100×100-100÷100 = 9999
1) 100×100 = 10000
2)100÷100 = 1
3) 10000-1 = 9999
780×100-100÷28 =
1) 780×100 = 78000
2)100÷28 =
3) 78000- =
100×100-100÷100 = 9999
1) 100×100 = 10000
2)100÷100 = 1
3) 10000-1 = 9999
780×100-100÷28 =
1) 780×100 = 78000
2)100÷28 =
3) 78000-
= 