An easy way with counting by ones is using ur fingers, so if ur doing 9 times 9 count to ur 9th finger, put your 9th finger down, then u would have one finger up on ur right side, and 8 fingers up on ur left side, so then it will show u that ur answer is 81,
2 years is the same as 24 months, so the equation would be: 685 = 24x + 85, where x is the monthly fee. 600 = 24x 600/24 = x x = 25 The monthly fee is $25.
