Adam has 90 marbles.
Bryan has 50 less marbles than Adam.
How many marbles do they have?
- 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 Bryan 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
(2) The total is not given.
(c)
Who gets the shorter bar?
(1) Adam
(2) Bryan
Bryan has 50 less marbles than Adam. So, (2) Bryan gets the shorter bar.
(d)
Number of marbles that Bryan has
= 90 - 50
= 40
Answer(s): (a) 2; (b) 2; (c) 2; (d) 40