Adam has 90 marbles.
Bryan has 10 marbles.
How many more marbles does Adam have than Bryan?
- 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) Adam
(2) Bryan
- Number of marbles that Adam has more than Bryan = _____
(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
(2) The total is not given.
(c)
Who gets the shorter bar?
(1) Adam
(2) Bryan
Adam has 90 marbles but Bryan has 10 marbles.
10 is less than 90. So, (2) Bryan gets the shorter bar.
(d)
Number of marbles that Adam has more than Bryan
= 90 - 10
= 80
Answer(s): (a) 2; (b) 2; (c) 2; (d) 80