Adam needs 90 beads.
He has 70 beads.
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 beads 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
70 beads is less than 90 beads. So, (1) 'Has' gets the shorter bar.
(d)
Number of more beads that Adam needs
= 90 - 70
= 20
Answer(s): (a) 1; (b) 2; (c) 1; (d) 20