Students use mental math. They describe reasonable and unreasonable sums and differences. Students use mental math to find the sums and differences of addition and subtraction facts at random. They solve addition and subtraction facts...

Students play a game of mathematical musical chairs, moving from desk to desk solving addition and subtraction problems.

Students practice various math skills using a polyhedral die. In this dice game lesson, students practice multiplication, addition, place value, and money using games. Standard dice may be used instead of a polyhedral die with...

In this order of operations worksheet, 5th graders review how to solve a problem using the order of operations. Students then determine the order of operations for the first calculation and then complete the second set by multiplying the...

In this addition word problem worksheet, students read the addition questions and write down the answers to the 10 word problems.

In this addition, subtraction and multiplication worksheet, students fill in 3 numbers on a card so that each side of the square adds up to 90. Students fill in 2 circles with 2 numbers so that the total of all 4 numbers in 900. Students...

Students simplify rational expressions. In this algebra lesson, students solve rational equations using multiplication and division. They apply properties of exponents and negative exponents to solve the problems.

Students discuss square numbers. In this math lesson, students find square numbers and support their answers. Students find sums and products that are square numbers.

Students discuss the sum of central angles and use string to create them on circles. They find the measure and length of both minor and major arcs. Students give examples of concentric, similar, and congruent circles and congruent arcs.

In this subtracting greater numbers worksheet, students, with a partner, problem solve and calculate the answers to six addition equations.

In this word problems worksheet, students solve word problems using bar models about money, days on a farm, and more. Students complete 6 problems total.

[Free Registration/Login may be required to access all resource tools.] The video uses the picture and describes how to add two numbers with a sum less than 20. The video is followed by additional practice problems.

[Free Registration/Login may be required to access all resource tools.] The video shows how to solve an addition word problem with a sum up to 20. The video is followed by additional practice problems.

[Free Registration/Login may be required to access all resource tools.] The video describes how to solve an addition word problem with a sum up to 20. The video is followed by additional practice problems.

A guide to support parents as they work with their students in sums and differences to 20.

A group of topics that include counting with pictures to 20, sums to 100, finding the missing number in a sequence, multiplication, expanded and standard form, and basic computation practice with addition, subtraction, multiplication, or...