Transcript Grid - NCETM

Teacher's Notes
Topic: Num - Multiplication
Grid
Lisa uses a grid to multiply 23 by 15
200 + 100 + 30 + 15 =
345
Now Lisa multiplies two different numbers.
Answer:
345
Complete the grid, then give the answer below.
Five numbers are given here- you can work out everything else. Could
we still work everything out if we were gien a different set of 5
numbers? Does it matter which 5 we are given?
Can we solve a grid if only 4 numbers are given? Why/why not?
Can you make your own question up?
360
400
8
3200
60
x
48
4200
70
2400
0
560
6
Put the cards in the correct place on the grid
[can be done with cards on the table, rather than on-screen]
L5
Grid
Lisa uses a grid to multiply 23 by 15
200 + 100 + 30 + 15 =
345
Answer: 345
Now Lisa multiplies two different numbers.
Complete the grid, then give the answer below.
360
400
3200
60
x
48
4200
70
8
2400
0
560
6