9 + (99/99) = 10
or
(9 / 9) + (9 - 9) + 9 = 1 + 0 + 9 = 10
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To make five nines equal 100, you can use basic mathematical operations. One way to achieve this is by adding the five nines together: 9 + 9 + 9 + 9 + 9 = 45. Then, you can multiply this result by 2: 45 x 2 = 90. Finally, add 10 to 90 to reach 100: 90 + 10 = 100.
9 + 9 - 9 + (9/9) You can use the parentheses if you want but they are not required if you follow proper order of operations: 9 + 9 - 9 + 9/9 = 9 + 9 - 9 + 1 = 10
You would use the number 9 ten times.
999+99+9+9+9
7*9 is 63. You can count seven nines or nine sevens, or you can use a calculator.