Parents Numeracy Workshop

1
Parents Numeracy Workshop

• Session 3
• Strategies for
• Multiplication Division

2
How do you multiply and divide?
57 x 2 78 2 43 x 50 742 2 36
x 25 700 4 18 x 15 65.5 ?
10 8 x 19 17 5 34 x 7 5.4 6
3
Mistakes children make
4
Multiplication
47 x 8 x 40 7 8 320 56 376 37 x 46
x 30 7 40 1200 280
1480 6 180 42 222
1702
5
Division
47 ? 8
6
or chunking
7
First on a number line 87 7
17
87
3
-14
subtract 7x2 or 7 twice
-70
subtract 7x10 or 7 ten times
We have subtracted seven 12 times and have 3
left so 87 7 12 r 3
8
A shop notice states that there are 87 shopping
days to Christmas. How many weeks is that?
87
-70 (10 weeks)
17
-14 (2 weeks)
3
So its 12 weeks (and 3 days) of shopping to
Christmas.
9
432 school children are going on an outing. If
each bus takes 15 passengers, how many buses will
be needed?
432
-300 (20 buses)
132
- 90 (6 buses)
42
-30 (2 buses)
12 (people left)
So we need 29 buses or 28 buses and some cars!