Fast addition and subtraction techniques
- how to do fast addition in mind
- how to do addition faster in mind
- how to do fast addition and subtraction in mind
- how to calculate addition fast in mind
Addition tricks for grade 1
How to do fast addition and subtraction in mind...
Addition Tips and Tricks
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Here are lots of "thinking tricks" you can use to make addition easier.
Use the ones that make sense to you!
Count From A Number Upwards
Example: 6 + 3
Think "6 ...
7, 8, 9"
Hint: start from the larger number.
Example: 2 + 6
2 + 6 is Harder: "2 ... 3, 4, 5, 6, 7, 8"
6 + 2 is Easier: "6 ...
Fast addition test7, 8"
So do 6 + 2 instead (you get the same answer).
Jump Strategy
We can also count by 2s or 10s, or make any "jumps" we want to help us solve a calculation.
Example: 4 + 12
Think "4 ...
14 ... 15, 16"
Adding Up To Ten
See if any numbers add to 10. They don't have to be next to each other.
Example: 7 + 8 + 3 + 2 + 5
7+3 is 10,
8+2 is another 10, which makes 20,
Plus 5 is 25
Do The Tens Last
Break big numbers into Tens and Units, add the Units, then add on the Tens.
Example: 14+5
Break the "14" into Tens and Units: 10 + 4
Add the Units: 4 + 5 = 9
Now add the Tens: 10 + 9 = 19
Think "4 plus 5 is 9, plus 10 is 19"
Another Example: 14 + 12
Break into Tens and Units: 10 + 4 + 10 + 2
Add the Uni
- how to add quickly in mind
- how to do addition in mind