Mrs Fong baked 407 more cookies than Min. After Mrs Fong sold 141 of her cookies, she had 3 times as many cookies as Min.
- How many cookies did Min bake?
- How many cookies did Mrs Fong bake?
| |
Min |
Mrs Fong |
| Before |
1 u |
1 u + 407 |
| Change |
|
- 141 |
| After |
1 u |
1 u + 266 |
(a)
After
Number of cookies that Min had = 1 u
Number of cookies that Mrs Fong had = 3 x 1 u = 3 u
Before
Number of cookies that Min baked = 1 u
Number of cookies that Mrs Fong baked = 1 u + 407
3 u = 1 u + 407 - 141
3 u - 1 u = 266
2 u = 266
1 u = 266 ÷ 2 = 133
Number of cookies that Min baked
= 1 u
= 133
(b)
Number of cookies that Mrs Fong baked
= 1 u + 407
= 133 + 407
= 540
Answer(s): (a) 133; (b) 540
