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.
Q2:
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.
Q3:
Think about adding 8 and 7.
One of the equations is WRONG. Which one is it?
- A
- B
- C
- D
- E
Q4:
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?
Q9:
Find .
Hint: Add the ones.
Q10:
Which expression is equal to ?
- A and 1 less
- B and 1 more
- C and 1 less
Q11:
Make 10 to help find .
Q12:
Which expression is equal to ?
- A and 1 less
- B and 1 more
- C and 1 more