Lesson Worksheet: Choosing Strategies to Add Mathematics • 1st Grade
In this worksheet, we will practice using different strategies to add two numbers with sums up to 20 and choosing which strategies are best.
James and Hannah are trying to find .
James uses the fact that and says that .
Hannah uses the fact that and says that .
Who is correct?
- AThey are both wrong.
- BThey are both correct.
- COnly Hannah is correct.
- DOnly James is correct.
Think about adding 8 and 7.
One of the equations is WRONG. Which one is it?
This is an addition machine. It adds six to any number you put in.
What number will you get if you put 3 in?
What number will you get if you put 12 in?
Hint: Add the ones.
Which expression is equal to ?
- A and 1 less
- B and 1 more
- C and 1 less