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Picnic Mystery Numbers worksheet preview

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Picnic Mystery Numbers

Grade 1 picnic practice finding the unknown number in addition and subtraction equations within 20, using ten frames, number lines, and stories.

Grade 1MathInteractive · Printable

Aligned to1.OA.D.8

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 13 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 1
Subject
Math
Question types
Fill in the blank, Multiple choice, Sorting, Short answer

About this worksheet

What students practice

  • Students find the unknown number in addition and subtraction equations within 20.
  • Students use ten frames and number lines to find a missing part.
  • Students write an equation with an unknown to match a story and solve it.

How to use

Do the first picture problem together with counters or a number line. Remind students to check each answer by putting it back into the equation.

Curriculum

Common Core standard covered

1.OA.D.8

Find the unknown number in an addition or subtraction equation.

Preview

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Name Date

Picnic Mystery Numbers

Find the number that makes each equation true.

Picnic pictures

Use the picture to find the mystery number.

1.

Mom wants 10 cups on the picnic blanket. Each dot is a cup she has. How many more cups does she need?

7 +   = 10

2.
56789101112131415
A grasshopper starts at 6 and hops to 13. How many spaces did it hop?

6 +   = 13

3.
567891011121314151617181920
A frog starts at 17 and hops back to 12. How many spaces back did it hop?

17 −   = 12

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