It is a nonsensical statement.
it equals 4200
1 + 2 + 3 + 4 + 5 - 6 - 7 + 98 = 100
7-1=6
6333
7/.7 * 7/.7 = 100
1+2+3+4+5+6+7+ 8*9 = 100
100.8571
100 ÷ 15 = 6 2/3 → 6 2/3 × 15 = 100
I have it! it's -1+2-3-4-5-6-7+8+90=100.
16.6667
It equals 7/6.
6/7 = .86