Addition
Addition is counting small numbers to create larger numbers.
Adding in your head
Remember, you can always jot down numbers on paper while you are adding in your head.
For simple numbers, you can try to add them in your head.
You can make it easier by:
Remember, you can always jot down numbers on paper while you are adding in your head.
For simple numbers, you can try to add them in your head.
You can make it easier by:
- Breaking up numbers
40 + 67 is the same as
40 + 60 + 7, which is
107 - Rounding numbers
42 + 89 is the same as
(40 + 80) + (2 + 9), which is
120 + 11, which is
131
Writing it down
When writing down sums, separate the numbers into units, tens, hundreds and thousands. List the numbers in a column and always start adding with the units first.
So when adding together 7948 + 1223, you should write it down like this:
When writing down sums, separate the numbers into units, tens, hundreds and thousands. List the numbers in a column and always start adding with the units first.
So when adding together 7948 + 1223, you should write it down like this:
Some tips for addition
- Estimate first and check afterwards - it's a good idea to estimate a rough answer first and then check your actual answer
- Order doesn't matter - remember that in addition 394 + 88 is the same as 88 + 394.
- Key words - look out for these words in problems: total, sum, altogether, more. They all indicate an addition calculation