Bryan has 100 marbles at first.
Bryan gives Adam some.
Now, Bryan has 50 marbles.
How many marbles does Bryan give to Adam?
- 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) Has at first
(2) Has now
- Number of marbles that Bryan gives to Adam = _____
(a)
Which model should we draw?
(1) Model Part-whole
(2) Model Comparison
We should draw a (1) Model Part-whole.
(b)
Is the total given?
(1) Yes
(2) No
(1) The total is given.
(c)
Who gets the shorter bar?
(1) Has at first
(2) Has in the end
50 marbles is less than 100 marbles. So, (2) 'Has in the end' gets the shorter bar.
(d)
Number of marbles that Bryan gives Adam
= 100 - 50
= 50
Answer(s): (a) 1; (b) 1; (c) 2; (d) 50