Tuesday, 20 September 2011

X 4

We have been looking at using our doubles and halves knowledge to multiplying and divide numbers. Did you know that four is the same as 2x2? Well if you double a number (x2) then double again you get the same answer as times 4. If you half a number and half again it is the same as dividing by 4.

Check out our show me to see what we mean.

Sunday, 18 September 2011

Review Week

This week we are looking back at the strategies we have practiced this term and applying them in new problems and activities. We will be practicing our basic facts and building our fraction knowledge. Phew, what a busy week we have planned...

Wednesday, 14 September 2011

This week we have been looking at a strategy called rounding and compensating. This involves borrowing extra numbers to make a tidy number, adding the two numbers then adjusting the answer at the end to get the correct answer. See how we use this strategy to solve these problem on our show me videos.

Thursday, 8 September 2011

Using Tens Doubles

Look at how Josh uses his doubles when the double is in the tens column.

Tuesday, 6 September 2011

Monday, 5 September 2011

This week we are using our doubles knowledge

We can find answers to problems like 7+8 by using double 7 and 1 more. We know double 7 is 14 and one more is 15 so 7 + 8 = 15
we know...
Double 2 is 4        Double  3 is 6
 Double 4 is 8         Double 5 is 10 
Double 6 is 12       Double 7 is 14
 Double 8 is 16       Double 9 is 18

This makes adding numbers to 20 easy.