# 1st Grade Common Core: 1.OA.8

Common Core Identifier: 1.OA.8 / Grade: 1

Curriculum: Operations And Algebraic Thinking: Work With Addition And Subtraction Equations.

Detail: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? - 3, 6 + 6 = ?.

69 Common Core State Standards (CCSS) aligned worksheets found:
Another worksheet with fact family houses in which students much write the correct numbers.

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More fact family subtraction-addition fact family triangles to solve.

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Write the correct numbers in each addition/subtraction fact family triangle.

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Write the correct addition/subtraction fact family for each set of numbers.

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Solve to find the answers to the basic addition facts. Then color according to the key to reveal an Earth Day picture.

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Kids look through a grocery store ad paper and choose 3 foods they'd like to buy. They cut out the pictures and prices, then glue them onto the worksheet. Then they must add the prices of the 3 items together to find the sum.

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Use the number lines to determine the missing quantity in each subtraction fact. Use the "count back" technique.

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Solve the simple one-digit addition problems, and color the hot air balloon picture according to the code.

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After answering the addition facts, color the sailboat according to the key.

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Solve the facts and color this adorable brown dog with black spots.

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Find the sums and color; Picture makes a colorful clownfish.

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Find the sum for each problem, then color the mystery picture according to the code.

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Write the sum for each addition problem, then color the parrot according to the key.

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Write the answers to the addition math facts and color according to the key.

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Find the sum for each addition fact. Then color according to the key. The mystery picture is a colorful dragon.

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Solve the basic addition problems. Each problem has addends up to 9 and sums up to 18. Then color the summer scene according to the key.

(Approx. grade levels: K-2)

(Approx. grade levels: K-2)

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Color the blue whale mystery picture after solving the basic addition facts.

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Write the sums for the basic addition facts, then color according to the key. The mystery picture is a reindeer.

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Solve the basic addition problems. The color according to the key at the bottom of the page. All addition problems have addends between 1 and 12.

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Use the number line to determine the missing number in each subtraction fact.

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Color a king and queen's castle. Solve the basic adding facts and color the picture.

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Memory match card game. Flip cards to match each addition fact with the correct domino.

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Answer the addition facts and color the rocket picture according to the code at the bottom.

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Solve the problems to reveal fruits and vegetables: a red apple, a yellow banana, green guava fruit, and an orange carrot.

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Write the answers to the addition math facts and color the Thanksgiving turkey according to the key.

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Solve the addition problems, the color-by-number according to the key. Picture makes a colorful rooster.

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Write the answers to the addition math facts and color according to the key.

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Students will complete the basic addition problems and use the answers and their corresponding colors to complete this worksheet.

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Solve the addition problems and color according to the key to reveal two different Thanksgiving-themed mystery pictures.

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Color the picture by solving the basic addition problems to find the friendly robot!

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This page includes 6 number bonds, each with one number missing. Students will use addition or subtraction to find and fill in that missing number.

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Depending on which worksheet from this file you give your students, they will color either a dog or a cat.

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These horizontal number bonds have the sums on the right side.

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Solve the addition problems and color the worksheet based on the key. Depending on which you complete, you will create either a police car or a fire truck.

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Add or subtract to find the missing part of each number bond.

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Here are 6 more number bonds for students to complete using addition and subtraction.

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This version of the adding table has a blue bear at the top of the page.

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Will this mystery picture be a boat or a plane? It depends which worksheet you give your students!

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Adding problems with 2-digits; Requires regrouping; Thanksgiving turkey pictures.

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Will your worksheet reveal a tasty summer treat or classic beach toys? It depends which of the two worksheets in this file you complete.

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On their way through this maze, your students will fill in the number of pumpkins their path passes. At the end, they will add up all the pumpkins to find the total.

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Subtract to find the difference for each basic fact shown. Then color according to the key at the bottom to reveal a beautiful castle with flags.

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Draw the correct number of dots to represent the missing number in each number bond.

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*Scoot!*is a fun game that the whole class can play together. Students move to each desk in the classroom, solving basic addition problems. Game includes 30 task cards, teacher instructions, and a student answer worksheet.

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Students will plot the given points and reveal the mystery picture: a Valentine's Day heart.

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This file contains two mystery picture worksheets. They look very similar but depending on which one you do, the picture will be different.

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Have your students complete this maze and solve the addition problem by filling in the number of pumpkins the good witch passes on her way through the maze and adding them together.

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Complete the mixed-up addition table by writing sums in the empty squares.

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Use addition or subtraction to determine the missing number in each part-part-whole box.

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Each number bond on this printout has two sets of objects. Students will count the objects to fill in the number bonds.

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Students love playing our Scoot! games. There are 30 task cards, answer sheets for 20, 25, and 30 questions, and teacher instructions. This version of Scoot! has simple math addition facts to be solved, ideal for students in grades K - 2.

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Complete the number bonds and write the equation represented by the number bond in the blank spaces.

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Here's another version of the addition table. This one has a pink bear graphic at the top.

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Which worksheet they complete will determine whether your students color in an apple or a banana.

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Using the sums from basic addition facts, color according to the key to find a cute fox.

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This worksheet has 4 number bonds for students to complete. Below each one there is space for them to fill in the complete equation expressed by the diagram.

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In this game, kids take turns rolling a die. The number rolled corresponds with a column of math facts on the game board. They read the column of addition facts (with answers) as quickly as possible.

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Find the sums and color the shapes accordingly to reveal a picture of two lanterns.

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These number bonds are laid out horizontally with the sums on the left.

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This page has four mini charts that you can cut apart and give to students.

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Complete the addition problems and color the page according to the key. The two worksheets have the same pattern, but when colored in, each will reveal a different picture.

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Find the sums and color accordingly to reveal the mystery image.

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This is our most difficult Halloween addition maze, for those especially talented at navigating all the twists and turns. They'll have to add up 7 numbers to find the sum of all the pumpkins they pass.

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