Practice Problems — Set 18

2.OA.A.1 · Use addition and subtraction within 100 to solve one- and two-step wo…

Print and write your answers. Use diagrams to show thinking.

Warm-up

1. Talk through today's focus: Use addition and subtraction within 100 to solve one- and two-step wo… 2. Try one oral example together before writing. 3. Use the diagram to explain your thinking.

_See printable PDF for diagram._

Written practice

1. Two-step: 6 red and 5 blue marbles, then lose 1. How many now? ___ 2. Compare: Team A 38 points, Team B 33. Difference? ___ 3. Draw a bar model for: 6 + 5 + 3 4. Write an equation for your story: ___ + ___ = ___ 5. Does your answer make sense? Explain in one sentence. 6. Create a two-step word problem for 2.OA.A.1. 7. Explain your thinking for set 18 in one sentence. 8. Create your own problem for 2.OA.A.1.

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More written practice

1. Apply Use addition and subtraction within 100 to solve one- and two-step wo… (item 9, set 18): show your work. ___ 2. Apply Use addition and subtraction within 100 to solve one- and two-step wo… (item 10, set 18): show your work. ___ 3. Apply Use addition and subtraction within 100 to solve one- and two-step wo… (item 11, set 18): show your work. ___ 4. Apply Use addition and subtraction within 100 to solve one- and two-step wo… (item 12, set 18): show your work. ___ 5. Apply Use addition and subtraction within 100 to solve one- and two-step wo… (item 13, set 18): show your work. ___ 6. Apply Use addition and subtraction within 100 to solve one- and two-step wo… (item 14, set 18): show your work. ___

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Patterns and rules

1. Identify the rule in today's 2.OA.A.1 practice. 2. Show your work with a drawing or diagram. 3. Explain your answer to a parent.

_See printable PDF for diagram._

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Stretch

1. Create your own 2.OA.A.1 question for a parent to solve. 2. Explain your method in two sentences.

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Parent tip: Underline the question and key numbers