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Q.1 Mixed operations word problems - up to 20

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What are mixed operation word problems?

Mixed operation word problems are math problems written in sentences that may ask you to add or subtract within the same problem. The numbers are small (up to 20), and you must decide which operation to use to find the correct answer.

Example:
  • Sara had 9 apples. She ate 2. Then her friend gave her 5 more. How many apples does she have now?
Note

Always read the problem carefully. Look for clues that tell you when to add and when to subtract.

How do you identify what to do?

To solve mixed operation word problems, you must figure out which part of the story is addition and which part is subtraction.

Steps:
  • Find the action: Does the story add items or take them away?
  • Write a number sentence for each part.
  • Solve step by step until you reach the final answer.
Note

Words like together, in all, more often mean addition. Words like left, take away, fewer often mean subtraction.

Examples of mixed operation word problems

Here are some sample problems and how to solve them step by step:

Examples:
  • Tom had 7 toy cars. He got 4 more. Then he gave 3 to his friend. How many toy cars does Tom have now?
    7 + 4 = 11, 11 − 3 = 8. Answer: 8 cars.
  • Lila saw 6 birds in the tree. 2 flew away. Then 5 more came. How many birds are there now?
    6 − 2 = 4, 4 + 5 = 9. Answer: 9 birds.
Note

Solve in order, just like the story tells it. Do not skip steps, or you might get the wrong answer.

Tips for solving word problems

Solving word problems is easier if you use strategies to organize your thinking.

Helpful Strategies:
  • Draw a picture or use counters to show what happens in the story.
  • Underline important words like left, more, or in all.
  • Check your answer: does it make sense in the story?
Note

Take your time. Even simple problems are easier when you show your work step by step.