Worksheet: Addition with Numbers up to 20: Using Multiple Strategies

Practice using addition strategies to add within 20 and identify addition expressions equal to the same number.

Q1:

Which of these is NOT equal to 15?

Q2:

Calculate .

Q3:

Calculate .

Q4:

What is ?

Q5:

Find .

Q6:

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?

AOnly Hannah is correct.
BThey are both wrong.
COnly James is correct.
DThey are both correct.

Q7:

What is 7 add 13?

Q8:

Think about adding 8 and 7.

One of the equations is WRONG. Which one is it?

Q9:

Tiffany was asked to solve .

She wrote

Is her solution correct?

Ayes
Bno

Q10:

Charlotte 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 .

Q11:

Jacob is adding 8 and 6 by first making 10.

Find the missing number in his calculation.

Q12:

Owen tried to solve by using the making ten strategy, but he got the answer wrong.

His teacher circled the mistake in his answer. Help him by finding .

Q13:

Anthony was asked to solve .

He wrote

Is his solution correct?

Ayes
Bno

Q14:

Emma 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 .

Q15:

Michael was asked to solve .

He wrote

Is his solution correct?

Ayes
Bno

Q16:

This is an addition machine. It adds 6 to the numbers on the left.

Which numbers are missing?