# 1st Grade Common Core: 1.OA.4

Common Core Identifier: 1.OA.4 / Grade: 1

Curriculum: Operations And Algebraic Thinking: Understand And Apply Properties Of Operations And The Relationship Between Addition And Subtraction.

Detail: Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.

39 Common Core State Standards (CCSS) aligned worksheets found:
Here are 6 more number bonds for students to complete using addition and subtraction.

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In this week's worksheet set, students will practice counting by 10s (6, 16, 26, 36...), find "one more" and "one less" than a given number, write the times shown on the analog clocks (11:00 and 1:00), and illustrate a math fact family.

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How many more counters are needed to make 20 in each group?

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

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

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This week you students will decompose 2-digit numbers into 1s and 10s, draw a model to solve an addition problem, determine the number of straight sides on polygons, and continue shapes in a pattern.

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

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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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On these Math Buzz worksheets, your first graders will measure a whale using non-standard units, identify solids (cones, cylinders, cubes), subtract, and identify shapes that have equal parts.

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

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For the tenth week of M.B., students will order objects by length (shortest to longest), identify solid shapes (cubes, cones, spheres), complete a pictograph, and answer place value questions.

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

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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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In this set, pupils will identify cubes, spheres, and cylinders. They will also complete an addition bar model, use non-standard units to measure a lizard, and compare two digit numbers (using <, >, and =).

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

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Count by twos starting with 2 (2, 12, 22, 32, 42...), practice repeated addition, as well as basic addition and subtraction.

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

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Identify solid shapes (spheres, cubes, rectangular prisms). Answer questions from a pictograph. Complete a bar model. Fill in the missing parts on a tally chart.

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

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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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Draw a model to solve an addition problem. Answer a question with tally marks. Show "one less" than the given numbers. Solve basic subtraction problems.

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

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On these worksheets, students will count by tens starting with (8, 18, 28, 38...), complete a part-part-whole diagram, complete a fact family, and use place value blocks to find a number.

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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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Your students will review place value, identify the number of tens and ones in a 2-digit number. Add zero to single-digit numbers. Identify a polygons, including hexagons. Count up from 2-digit numbers.

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Another worksheet with fact family houses in which students much write the correct numbers.

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More addition square brain teasers for students to solve; Sums up to 30; Medium level.

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Yet another set of addition puzzles on a 3 by 3 grid for students to solve.

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Students complete the addition squares by putting numbers in boxes to make the given sums. Easiest level. 2x2 grid.

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More level 1 addition squares; Includes 3 puzzles for students to solve; Sums up to 18

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Even more level level 1 addition puzzles to build students' logic skills.

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Most difficult math addition squares on a 3x3 grid. Challenging level.

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More difficult addition squares. Solve by placing numbers in boxes to find the given sums. 2x2 grid.

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