~ 12 Problem Sums for YOU BIN ~

Below are the answers for the 12-problem sums worksheet for You Bin and the other 15 pupils who did it during last Thursday's supplementary class.



1)   4 units ---->  300 coins
       1 unit -----> 300 divide by 4 = 75 coins
      Jun Yuan had ------> 75 + 75 + 75 + 27 = 252 coins

       He had 252 coins.




2)   Total -------> 8 1/2 units = 17 equal units
       1 unit ----->  4
       Total ------> 4 x 17  = 68 flowers
       
        There are 68 flowers altogether




3)  1 unit ----->  5 + 6 = 11 years
      Total age -----> 11 x 3 = 33 years

      Their total age is 33 years.




4)  357 + 15 = 372cm
         1 unit -----> 372 / 4 = 93cm
     
      Kate is ------->  93  - 15  = 78cm taller than Henry.




5)   5 units ----> 700ml
       1 unit ------>   700 / 5  = 140ml
    
       10 units ----->  140 x 10 = 1400ml

        The total capacity of the tank is 1400ml.




6)      3 units ----> $600
          1 unit -----> $600 / 3 = $200

           Total -----> $200 X 5 = $1000
               
                 They have $1000 altogether.



7)        5/14 -------> $490
            1/ 14 ------> $490 divide by 5 = $98
            14/14  ------> $98 X 15 = $1372

              Salary is $1372.



8)      Angle JML = 90-degrees
         Angle QML = 90 - 15 - 42 = 33-degrees
         Angle PML = 42 + 33 = 75-degrees



9)  3 x 11 = 33             15 x 3 = 45
      5 x 11 = 55             15 x 5 = 75
      3 x 5 = 15
       1 x 11 = 11



10)  2 units   ------> $360
       1 unit  ------> $360 / 2 = $180

        Total 9 units  -----> $180 X 9 = $1620



11a)  3/10

11b)  3 units ----> 12L
         1 unit -----> 12 / 3 = 4L
         10 units ------>  4L X 10  = 40L

          He used 40L of paint for the whole wall.



12)      4 units ------> $280
           1 unit --------> $280 / 4 = $70
           3 units -------> $70 X 3 = $210

            Each stationary costs --------> $210 / 7 = $30

            Each stationary costs $30.