Bryan and Adam have 16 marbles.
Bryan has 8 more marbles than Adam.
Find the number of marbles that Adam has.
- Which model should we draw?
(1) Model Part-whole
(2) Model Comparison
- Is the total given?
(1) Yes
(2) No
- Who gets the shorter bar?
(1) Bryan
(2) Adam
- Number of marbles that Adam has =
(a)
Which model should we draw?
(1) Model Part-whole
(2) Model Comparison
We should draw a (2) Model Comparison.
(b)
Is the total given?
(1) Yes
(2) No
(1) The total is given.
(c)
Who gets the shorter bar?
(1) Bryan
(2) Adam
Bryan has 8 more marbles than Adam.
So, (2) Adam gets the shorter bar.
(d)
If 8 marbles are taken away from Bryan, Bryan and Adam will have the same number of marbles.
Number of marbles that Adam has
= (16 - 8) ÷ 2
= 8 ÷ 2
= 4
Answer(s): (a) 2; (b) 1; (c) 2; (d) 4