Adam has 80 marbles at first.
Bryan gives him another 40 marbles.
How many marbles does Adam 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) Bryan gives him
- Number of marbles that Adam 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
(1) The total is given.
(c)
Who gets the shorter bar?
(1) At first
(2) Bryan gives him
40 marbles is less than 80 marbles. So, (2) 'Bryan gives him' gets the shorter bar.
(d)
Number of marbles that Adam has in the end
= 80 + 40
= 120
Answer(s): (a) 1; (b) 1; (c) 2; (d) 120