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Puzzle time: Christmas tree
In this numbers tree worksheet, students put numbers one through five on the bottom and add up the two numbers next to each other to get the upper layers of the tree. Students fill in 15 spaces to the tree.
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Addition: Exercise 4
In this addition worksheet, students add one digit to two digit numbers without having to carry over. There are thirty problems. Students can complete this online and submit the answers.
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Multiplication and Division Drills
In this multiplication worksheet, students complete multiplication problems including numbers up to 3 digits. Students complete 16 problems total.
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Deciding When to Regroup
In this addition worksheet, 2nd graders determine if they need to regroup or not in 3 word problems. Students circle their answers, yes or no, and write the tens and ones numbers in the blanks provided.
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2 Digit Addition Without Regrouping
In this addition instructional activity, students solve problems with the help of a number line. Students complete twenty simple two-digit addition problems.
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Addition Exercises
In this early childhood addition practice activity, students use the pictured counters to solve 9 problems that require them to add 1 digit numbers.
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Count On
In this counting on worksheet, students solve 5 problems in which a two digit number is the starting point and students "count on" an additional number. Example: Count on 6 from 24.
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Homophones Activities 1-5
In this language arts worksheet, students discover that homophones are words that sound alike. Students complete 5 activities with homophones: matching words to pictures, completing sentences, explaining differences between words and...
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Four + One = Five
In this algebra activity, students decipher a cryptarithm to make an addition problem. They have to figure out what digit each letter represent to be able to solve this problem. There is an answer key with this problem.
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Addition up to 10
In this addition activity, 1st graders add numbers to ten, completing problems as fast as possible, 20 total. An answer key is included on page 2.
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Plurals: Words Ending -sh or -ch
The instructional activity starts with a brief explanation about adding -es to pluralize nouns that end in -sh or -ch, and adding -s to other nouns. Then your learners circle the correctly spelled plural version of a noun in 10...
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Early Mental Math: Practice
Pupils start from a given number and count forward by 1s, 2s, and 10s. They "make ten" in 4 addition problems, and add or subtract 2 in the rest. Finally, they circle the odd numbers in a list from 1-14.
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A Beginning Look at Basic Algebra-Lesson 1-12
In this Algebra I worksheet, 9th graders explore the basic of beginning algebra:  the order of operations, integer operations, translating phrases and sentences, and solving basic one-step equations.  The six page worksheet...
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Decimal Addition Level 6 Adding Three Numbers Containing Tenths
In this math activity, students practice adding 3 decimal numbers which contain tenths. The decimals are already lined up in the columns of the 12 problems.
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Add Fractions With Like Denominators (J)
In this subtracting fractions worksheet, students use their math skills to solve 14 problems that require them to subtract fractions with like denominators.
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Add Fractions with Like Denominators (E)
In this fraction addition learning exercise, 5th graders add the numerators with like denominators and write the answers as mixed numbers or whole numbers. Students solve 14 problems.
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Patterns and Sequences
Ninth graders examine sequential number patterns and the Fibonacci sequence.  Given number patterns, they determine the next number in a sequence.  Students develop their own number patterns and exchange them with another to be solved.
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Addition Up To 10 Speed Race 5 And 6
In this addition to 18 worksheet, 1st graders complete two sets of ten addition to 18 problems. This is meant to be a timed addition worksheet.
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Adding US Coins
In this money worksheet, 2nd graders count the number of coins to add up the amount of money that is shown. Students respond to 10 questions, writing the amount of money that is depicted on the line beside each picture.
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Problem Solving: Number Patterns
In this number patterns worksheet, students use the patterns of numbers within each word problem to solve and answer the six word problems.
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Addition Practice Single Digits
In this addition instructional activity, students complete a set of 8 problems, adding one-digit numbers together. A website reference for additional activities is given.
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Money Banks
In this different coins worksheet, 1st graders guess which piggy bank has the most money in it.  Then students count the actual amount of money in each piggy bank by counting and adding up the coins.
Los Angeles County Office of Education
Assessment for the California Mathematics Standards Grade 3
Assess scholars' knowledge with a 22-page assessment that covers place value, patterns, probability, estimation, measurement, geometric figures; and their ability to add, subtract, multiply and divide proficiently. 
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Addition Drills, part 3
Here's an addition drill for scholars who are already comfortable with regrouping. There are 30 horizontally-aligned problems here, each with two 2-digit addends. Mathematicians use three examples as reference as they solve each of...