Bryan has 20 marbles at first.
Adam gives him another 9 marbles.
How many marbles does Bryan have in the end?
- 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) At first
(2) Adam gives him
- Number of marbles that Bryan has in the end =
(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
(2) The total is not given.
(c) Who gets the shorter bar?
(1) At first
(2) Adam gives him
9 marbles is less than 20 marbles.
So, (2) 'Adam gives him' gets the shorter bar.
(d)
Number of marbles that Bryan has in the end
= 20 + 9
= 29
Answer(s): (a) 1; (b) 2; (c) 2; (d) 29