Jane and Zara had an equal number of erasers at first. Jane used
14 of her erasers and Zara used
18 of her erasers. They used 6 erasers altogether. How many erasers did Zara have in the end?
| |
Jane |
Zara |
| Before |
4x2 =
8 u |
8x1 =
8 u |
| Change |
- 1x2 =
- 2 u |
- 1x1 =
- 1 u |
| After |
3x2 =
6 u |
7x1 =
7 u |
The number of erasers that Jane and Zara each had at first is the same. Make the number of erasers that Jane and Zara each had at first the same. LCM of 4 and 8 is 8.
Number of erasers that Jane and Zara used
= 2 u + 1 u
= 3 u
3 u = 6
1 u = 6 ÷ 3 = 2
Number of erasers that Zara had in the end
= 7 u
= 7 x 2
= 14
Answer(s): 14
