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In this worksheet, we will practice solving one-step addition and subtraction problems with numbers up to 20 by drawing a part–whole bar model.

Q1:

Find the missing number.

1 1 + 7 =

Q2:

Find the missing number to make the equation correct.

Q3:

1 2 + = 1 5

Q4:

+ 8 = 1 4

Q5:

Q6:

Isabella has 12 coins.

After she puts some in a bag, there are 7 left.