Adam and Bryan have 130 marbles.
Adam has 80 more marbles than Bryan.
Find the number of marbles that Adam has.
- 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 = _____
(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
(1) The total is given.
(c)
Who gets the shorter bar?
(1) Adam
(2) Bryan
Adam has 80 more marbles than Bryan.
So, (2) Bryan gets the shorter bar.
(d)
If 80 more marbles are given to Bryan, Adam and Bryan will have the same number of marbles.
Number of marbles that Adam has
= (130 + 80) ÷ 2
= 210 ÷ 2
= 105
Answer(s): (a) 2; (b) 1; (c) 2; (d) 105