Answer the following questions.
You can use counters and place value grids to help you.
1.
          2 8 5 7                      4 4 4 0
        +   3 0 7                      1 0 9 9
                                     +     9 8
            3 2 2 8                    9 0 0 7
        -     3 4 6                  - 5 1 6 8
2.   Work out 6483 + 594
3.   Work out 4039 – 314
4.   Here is a bar model.
                  1340                 2970
     Work out the value of the missing bar.
     Write down four relationships you can see in this bar model.
                      +                 =
                      +                 =
                      -                 =
                      -                  =
5.    Here is another bar model.
                               5024
      Select two numbers to make the model correct.
6.   Alfie has £2500 in the bank.
     He spends £659 on a laptop.
     How much money does Alfie have left in the bank?
     Show how you can check your answer is correct using an inverse.
7.   There are 684 cars in a multi-story car park.
     Between 9 am and 10 am 131 cars arrive and 45 leave.
     How many cars are in the car park at 10 am?
8.   There are errors in the following calculations.
     Find the errors and correct them.
     Calculation                  Error                Correction
  4 3 5 2
+ 3 5 8
  7 9 3 2
  5 3 4 9
-   3 7 8
  5 0 3 1