Fill in the blanks in units (Eg 3 u) or unit equations (Eg 1 u + 2).
Adam and Bryan have some stickers.
When Bryan uses
310 of his stickers and
Adam buys another 75 stickers,
they have the same number of stickers each.
Let the number of stickers that Bryan has in the end be 7 u.
- Number of stickers that Adam has in the end = _____
- Number of stickers that Bryan has at first = _____
- Number of stickers that Adam has at first = _____
- Total number of stickers that they have at first = _____
|
Bryan |
Adam |
Before |
10 u |
7 u - 75 |
Change |
- 3 u |
+ 75 |
After |
7 u |
7 u |
Comparing between Bryan and Adam |
1 x 7 = 7 u |
1 x 7 = 7 u |
(a)
Change equal stage into units.
The number of stickers that Bryan has in the end is repeated.
Change the ratio into units.
LCM of 7 and 1 = 7
Number of stickers that Adam has in the end = 7 u
(b)
Number of stickers that Bryan has at first = 10 u
(c)
Number of stickers that Adam has at first = 7 u - 75
(d)
Total number of stickers that they have at first
= 10 u + (7 u - 75)
= 10 u + 7 u - 75
= 17 u - 75
Answer(s): (a) 7 u; (b) 10 u; (c) 7 u - 75; (d) 17 u - 75