In this worksheet, we will practice using any strategy to add within 20 and comparing different strategies.
Q1:
Which of these is NOT equal to 15?
- A
- B
- C
- D
- E
Q2:
Calculate .
Q3:
Calculate .
Q5:
Ramy and Rania are trying to find .
Ramy uses the fact that and says that .
Rania uses the fact that and says that .
Who is correct?
- AOnly Rania is correct.
- BThey are both wrong.
- COnly Ramy is correct.
- DThey are both correct.
Q6:
Think about adding 8 and 7.
One of the equations is WRONG. Which one is it?
- A
- B
- C
- D
- E
Q7:
Rania was asked to solve .
She wrote
Is her solution correct?
- Ayes
- Bno
Q8:
Sally tried to solve by using the doubling numbers facts, but she got the answer wrong.
Q9:
George tried to solve by using the making ten strategy, but he got the answer wrong.
Q10:
Shady was asked to solve .
He wrote
Is his solution correct?
- Ayes
- Bno
Q11:
Aisha tried to solve by using the doubling numbers facts, but she got the answer wrong.
Her teacher circled the mistake in her answer. Help her by finding .
Q12:
Fady was asked to solve .
He wrote
Is his solution correct?
- Ayes
- Bno
Q13:
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?
Q14:
Find the smallest two digit number whose digits add up to 8.