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Worksheet
Math Salamanders Ltd.

Subtraction - Up to 20, Sheet 3

For Students 2nd - 3rd Standards
In this finding the differences worksheet, students subtract one-digit and two-digit from numbers to twenty. Students solve 40 problems.
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Lesson Plan
Curated OER

Number Lines and Bead Strings

For Teachers 2nd - 3rd
Students solve addition and subtraction problems using strings of beads and number lines. They mentally perform addition and subtraction problems, and write and solve story problems involving whole numbers.
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Lesson Plan
Curated OER

Geoboard Squares

For Teachers 2nd - 3rd
Students create squares of different sizes on a geoboard. They find and describe a pattern. Students use the pattern to determine the number of squares possible on a 10-by-10 geoboard. They create squares with a horizontal base (and...
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Worksheet
Curated OER

Addition Up to 20, Sheet 3

For Students 1st - 3rd
Adding numbers up to sums of 20 is the focus of this worksheet. Pupils complete a set of 24 problems by adding numbers to 20. A number line and reference website is given for additional activities.
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Worksheet
Math Salamanders Ltd.

Subtraction Up to 20 — Sheet 2

For Students 1st - 2nd Standards
Challenge your class with 20 subtraction problems. Learners will subtract single and double-digit numbers up to 20 with a number line.
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Lesson Plan
Curated OER

How Machines Help Us Stay Healthy

For Teachers 2nd - 4th
Students visit different departments at a local hospital to see how machines help peoples such as the CAT scan machine. They build a model of such a machine that shows how patients are moved in and out of the machine.
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Worksheet
Curated OER

Addition up to 12

For Students 1st - 2nd
In this addition facts worksheet, students solve 20 basic addition facts. Both addends are single digits. This sheet includes facts up to twelve.  
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Worksheet
Curated OER

Addition Up to 12, Sheet 2

For Students K - 2nd
For this addition worksheet, students complete a set of 20 problems, adding to number 12. A reference web site is given for additional activities.
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Worksheet
Curated OER

Addition - Up to 12

For Students 1st - 2nd
In this addition activity, students solve the horizontal addition problems. Students count on from the addend given to get the find the missing addend.
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Worksheet
Curated OER

Addition Up to 12-Sheet 5

For Students 2nd - 3rd
In this addition worksheet, students complete a total of 24 problems, filling in missing numbers, either addends or sums. A reference web site is given for additional activities.
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Worksheet
Curated OER

Addition Up To 12, Sheet 6

For Students 1st - 2nd
In this addition worksheet, students complete a total of 24 problems, adding number to 12. A reference web site is given for additional activities.
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Worksheet
Curated OER

Addition - up to 12

For Students 2nd - 4th
In this addition worksheet, students add numbers up to 12 in this addition chart. Students complete 2 charts where they add the horizontal number with the vertical number.
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Worksheet
Curated OER

Subtraction - up to 12 sheet 1

For Students 1st - 2nd
In this subtraction worksheet, students subtract numbers 0 through 12. Students complete 20 subtraction problems for numbers 0 through 12.
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Worksheet
Curated OER

Subtraction Up To 12

For Students 1st - 2nd
In this subtraction up to twelve worksheet, students solve twenty subtraction problems with addends up to twelve written horizontally.
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Worksheet
Curated OER

Subtraction Up to Twelve

For Students 1st - 3rd
In this subtraction up to twelve activity, students use the number line at the top to help them correctly answer 20 subtraction problems.
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Worksheet
Curated OER

Addition-Up to 20 (Sheet #1)

For Students 2nd - 3rd
In this addition learning exercise, students practice their adding with one--digit and two-digit numbers. Students complete the learning exercise by solving twenty-four addition problems.
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Worksheet
Curated OER

Addition-Up to 20 (Sheet #2)

For Students 2nd - 3rd
In this addition activity, students practice their adding skills. Students complete the activity by filling in the missing number in each of the forty addition problems.
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Worksheet
Curated OER

Addition - up to 20 sheet 5

For Students 2nd - 3rd
In this addition activity, students complete missing addend problems where they plug in numbers 1 - 20. Students complete 40 problems.
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Worksheet
Curated OER

Addition Up To 20: Missing Facts

For Students 1st - 2nd
In this addition up to twenty worksheet, students use their knowledge of addition facts fo fill in the missing numbers in two addition charts.
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Worksheet
Curated OER

Subtraction - Up to 20, Sheet 1

For Students 2nd - 3rd
In this subtraction practice learning exercise, students solve 20 problems that require them to subtract 1 or 2-digit numbers from 2-digit numbers.
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Worksheet
Curated OER

Addition: Adding On Ones

For Students 2nd - 3rd
In this addition-adding on ones activity, learners complete thirty problems by adding a different number of ones to a two digit number.
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Worksheet
Curated OER

Addition: Missing Addends Tens and Ones

For Students 2nd - 3rd
In this missing addend learning exercise, students fill in missing addends to arrive at given sums. All numbers are 2-digits. A reference web site is given for additional activities.
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Worksheet
Curated OER

Addition-Adding on Tens, Sheet 1

For Students 2nd - 4th
In this adding on tens worksheet, students add multiples of 10 to given numbers. A reference web site is given for additional activities.
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Worksheet
Curated OER

Addition - 2 digit addition sheet 1

For Students 2nd - 4th
For this addition worksheet, students add two digit numbers with and without regrouping. Students complete 30 two digit addition problems.

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