~ Math CA2 Revision Paper ~

Question 43


Step 1: Draw models

Step 2: Look at the models and you can see that there are 4 equal units, with the extra   2 5/6 ,  2 5/6 ,  1 3/4.


Step 3: To find the 1 unit, we must take the total and minus away 2 5/6 ,  2 5/6 ,  1 3/4.

19 5/12  -  2 5/6  - 2 5/6  - 1 3/4  = 12


Step 4:

So, 4 units ----> 12 kg

1 unit ----> 12kg divided by 4  = 3kg


Step 5:

Compare Mr Sim's model to Mrs Poh's,

Add up all the extra models

3 +  2 5/6  +  1 3/4   = 7 7/12 kg

Mrs Sim bought 7 7/12 kg more flour than Mr Poh.