Tina had 65 less chocolate bars than Abi. Abi used
45 of her chocolate bars and Tina used
12 of her chocolate bars. In the end, Abi had 3 times as much as Tina. Find the number of chocolate bars that Abi had at first.
| |
Abi |
Tina |
Comparing Abi
and Parry at first |
|
65 less |
| Before |
5x3 =
15 u |
2 u |
| Change |
- 4x3 =
- 12 u |
- 1 u |
| After |
1x3 =
3 u |
1 u |
Comparing Abi
and Parry in the end |
3 u |
1 u |
The number of chocolate bars that Abi had in the end is repeated. Make the number of chocolate bars that Abi had in the end the same. LCM of 1 and 3 is 3.
Number of chocolate bars that Tina had less than Abi
= 15 u - 2 u
= 13 u
13 u = 65
1 u = 65 ÷ 13 = 5
Number of chocolate bars that Abi had at first
= 15 u
= 15 x 5
= 75
Answer(s): 75
