Abi spent
23 of her money on 11 notebooks and 7 markers. The cost of each marker is 3 times the cost of each notebook. She bought some more notebooks with
12 of her remaining money. How many notebooks did Abi buy altogether?
| 11 notebooks + 7 markers |
Remaining
amount |
Total
amount |
| 2 p = 32 u |
1 p = 16 u |
3 p |
11
notebooks |
7
markers |
More notebooks |
Left |
|
| |
|
1 |
1 |
|
| 11 u |
21 u |
8 u |
|
|
Cost of 1 notebook = 1 u
Cost of 1 marker = 3 u
Cost of 11 notebooks = 11 x 1 u = 11 u
Cost of 7 markers = 7 x 3 u = 21 u
Cost of 11 notebooks + 7 markers
= 11 u + 21 u
= 32 u
2 p = 32 u
1 p = 32 u ÷ 2 = 16 u
Amount of remaining money that Abi spent on buying more notebooks
=
12 x 16 u
= 8 u
Number of notebooks that Abi bought with
12 of her remaining money
= 8 u ÷ 1 u
= 8
Total number of notebooks that Abi bought
= 11 + 8
= 19
Answer(s): 19
