In this Khan Academy interactive, students will compose and decompose numbers as collection of tens and some ones.
Tutorial videos on cross sections of 3D objects along with interactive practice problems.
In this Khan Academy activity, students will find 4th and 5th roots.
This quiz allows students to check their understanding of active transport processes.
This online tutorial covers primary and secondary active transport.
In this Khan Academy interactive, students will add 1 or 10 to a two digit number.
In this Khan Academy interactive, students will add ones or tens to a two-digit number.
In this Khan Academy interactive, students will add two-digit numbers to two-digit numbers.
In this Khan Academy interactive, students will solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20.
This interactive provides seven questions on adding 3 numbers together.
For this activity, students practice solving word problems by adding and subtracting fractions with like denominators.
This resource is a video tutorial which teaches students how to add 5+3+6 using properties of operations.
This video adds 7+6 using a number line.
This video adds 8+7 by making a group of ten.
This video covers how to add complex numbers.
In this Khan Academy activity, students will practice applying the addition rule in context.
This video shows how to rewrite (5x)/(2x-3)+(-4x^2)/(3x+1) as (-8x^3+27x^2+5x)/(2x-3)(3x+1).
In this article, students learn how to add or subtract two functions to create a new function.
This video simplifies (x^3+ 3x - 6) + (-2x^2 + x - 2) - (3x - 4).
This video goes over Venn diagrams and the addition rule for probability.