Multiplication Workshop 8/10/14

What might it mean? Are there any other words we can use for this process?

How many methods of multiplication do you know How many methods of multiplication do you know? Can you explain them to someone else?

How might you solve these problems How might you solve these problems? 2 x 2 = 25 x 2 = 315 x 6 = 24 x 50 = 0.75 x 100=

Can be done using jottings Should be quick Can be done using jottings

Count in 1s, 2s, 5s and 10s S T E P 1

e.g. 35 x 2 = 30 x 2 = 60 5 x 2 = 10 60 + 10 = 70 (only doubling at this stage) S T E P 2 e.g. 3 x 5 = 15

e.g. 7 x 10 = 70 TU 7 70 (0 is used as a place holder – you are not ‘adding a zero!’) S T E P 3

S T E P 4

S T E P 5

S T E P 5 Continued e.g. 0.75 x 100 = TU. Tth Hth 0. 7 5 75. 0 0 0. 7 5 75. 0 0 (or just 75) S T E P 5 Continued E.g. If 5 x 2 =10 Then 5 and 2 are factors of 10.

S T E P 6 E.g. 7 has only two factors: 7 and 1.

How might you solve these problems now How might you solve these problems now? 2 x 2 = 25 x 2 = 315 x 6 = 24 x 50 = 0.75 x 100=

Written Methods

How might you solve these problems How might you solve these problems? 2 x 3 = 32 x 2 = 345 x 9 = 4346 x 9 = 0.76 x 4 =

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

How might you solve these problems now How might you solve these problems now? 2 x 3 = 32 x 2 = 345 x 9 = 4346 x 9 = 0.76 x 4 =

Any questions?