Adam needs 40 stickers.
He has 20 stickers.
How many more does he need?
- 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) Has
(2) Needs
- Number of more stickers that Adam needs = _____
(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
(2) The total is not given.
(c)
Who gets the shorter bar?
(1) Has
(2) Needs
20 stickers is less than 40 stickers. So, (1) 'Has' gets the shorter bar.
(d)
Number of more stickers that Adam needs
= 40 - 20
= 20
Answer(s): (a) 1; (b) 2; (c) 1; (d) 20