Adam has 30 beads at first.
Adam gives away 20 beads.
How many beads are there left?
- 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) At first
(2) Adam gives away
- Number of beads left = _____
(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
(1) The total is given.
(c)
Who gets the shorter bar?
(1) At first
(2) Adam gives away
20 beads is less than 30 beads. So, (2) 'Adam gives away' gets the shorter bar.
(d)
Number of beads left
= 30 - 20
= 10
Answer(s): (a) 1; (b) 1; (c) 2; (d) 10