Math Salamanders Ltd.
Subtraction - Up to 20, Sheet 3
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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Number Lines and Bead Strings
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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Geoboard Squares
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...
Curated OER
Addition Up to 20, Sheet 3
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.
Math Salamanders Ltd.
Subtraction Up to 20 — Sheet 2
Challenge your class with 20 subtraction problems. Learners will subtract single and double-digit numbers up to 20 with a number line.
Curated OER
How Machines Help Us Stay Healthy
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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Addition up to 12
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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Addition Up to 12, Sheet 2
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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Addition - Up to 12
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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Addition Up to 12-Sheet 5
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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Addition Up To 12, Sheet 6
In this addition worksheet, students complete a total of 24 problems, adding number to 12. A reference web site is given for additional activities.
Curated OER
Addition - up to 12
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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Subtraction - up to 12 sheet 1
In this subtraction worksheet, students subtract numbers 0 through 12. Students complete 20 subtraction problems for numbers 0 through 12.
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Subtraction Up To 12
In this subtraction up to twelve worksheet, students solve twenty subtraction problems with addends up to twelve written horizontally.
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Subtraction Up to Twelve
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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Addition-Up to 20 (Sheet #1)
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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Addition-Up to 20 (Sheet #2)
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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Addition - up to 20 sheet 5
In this addition activity, students complete missing addend problems where they plug in numbers 1 - 20. Students complete 40 problems.
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Addition Up To 20: Missing Facts
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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Subtraction - Up to 20, Sheet 1
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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Addition: Adding On Ones
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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Addition: Missing Addends Tens and Ones
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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Addition-Adding on Tens, Sheet 1
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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Addition - 2 digit addition sheet 1
For this addition worksheet, students add two digit numbers with and without regrouping. Students complete 30 two digit addition problems.
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