~ Math CA2 Revision Paper ~

Question 41

Step 1: Draw models

It is printed that Benjamin is 1.4m tall.

Step 2: If you know Benjamin is 1.4m tall, you can find Kathy (0.18m shorter)
So, Kathy ----> 1.4m - 0.18m = 1.22m


Step 3: If you know Benjamin is 1.4m tall, you can also find Betty (0.3m taller)
So, Betty ----> 1.4m + 0.3m = 1.7m


Step 4: You can find the total height of Betty and Kathy now.

Total ----> Kathy + Betty
             =  1.22m + 1.7m
             = 2.92m






Question 42

Step 1: Draw models

You know that Mr Yeo has $6000. He gave his wife $2280.

Step 2: You can find how much he is left after giving his wife
Mr Yeo left ----> $6000 - $2280 = $3720



You know that he gave 5/8 of this remaining $3720 to his 3 children.

Step 3: Find 5/8 of this remaining $3720.

$3720 is cut into 8 units, so
1 unit ----> $3720 divide by 8 = $465

You know 1 unit is $465 now, so you can find 5/8 which is 5 units.
5units-----> $465 x 5  = $2325



Step 4:He gave 5/8 to his 3 children, means he gave $2325 to his 3 children.

So, 3 children ----> $2325
1 child ---->  $2324 divided by 3  = $775