Addition Strategy Practise

Have a go at these. Remember the same rules apply when you solve decimal problems, you just have to  make sure you are using the right place value columns.
You can choose which strategy you would like to use, but use all of the different strategies at some stage.

1)    34 + 78 =

2)    359 + 102 =

3)    3.8 + 6.9 =

4)    57 + 88 =

5)    23.7 + 12.4 =

If you have finished these, ask someone at home to write some similar problems for you to solve.
Ask if you get stuck!

Addition Strategy Revision

Today we revised the 3 key addition strategies. They are:

• Place Value Strategy

(Numbers are separated into the tens and ones)

Eg.    45 + 13 = (40 + 10) + (5 + 3)

                        = 50 + 8

                        = 58

- Advanced Place Value Strategy - Holding the biggest number

Or. 57 + 47 = 57 + 40 + 7

                   = 97 + 7

                   = 104

• Rounding and Compensating Strategy

(One of the numbers is rounded up or down to a ‘tidy ten’, an equal amount must then be taken away or added to the other number in the equation to balance it. NB: In addition problems you use two different actions addition/subtraction)

Eg. 63 + 59 = 62 + 60

-1     +1  

                    = 122