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 =![77996\frac{3}{7}](/tpl/images/4742/6723/45a71.png)
1) 780×100 = 78000
2)100÷28 =![3\frac{4}{7}](/tpl/images/4742/6723/9bc69.png)
3) 78000-
= ![77996\frac{3}{7}](/tpl/images/4742/6723/45a71.png)