Bryan has 100 marbles.
Adam has 40 less marbles than Bryan.
How many marbles does Adam 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) Bryan
(2) Adam
- Number of marbles that Adam 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) Bryan
(2) Adam
Adam has 40 less than Bryan. So, (2) Adam gets the shorter bar.
(d)
Number of marbles that Adam has
= 100 - 40
= 60
Answer(s): (a) 2; (b) 2; (c) 2; (d) 60