In this Khan Academy interactive, students will compose and decompose numbers as collection of tens and some ones.
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.
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.
In this Khan Academy interactive, students will solve addition word problems using objects to represent the problem, when solving "add to - result unknown" problems.
In this Khan Academy iinteractive, students will practice addition and subtraction word problems, within 20, with result unknown, change unknown, and addend unknown.
In this Khan Academy interactive, students will practice addition and subtraction word problems, within 20, with result unknown, change unknown, and addend unknown.
In this Khan Academy interactive, students will use a variety of representations such as objects and pictures to represent addition within 10.
This interactive provides seven questions all about adding within 20.
In this Khan Academy activity, students will demonstrate fluency with addition within 5.
In this Khan Academy interactive, students will add two-digit numbers with multiples of tens and some ones by decomposing them.
In this Khan Academy interactive, students will compare two two-digit numbers based on the value of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
In this Khan Academy interactive, students will compare two-digit numbers based on the value of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
In this Khan Academy interactive, students will be asked to identify whether the number of objects, within 10, in one group is greater than, less than, or equal to the number of objects in another group, by using matching and counting strategies.
In this Khan Academy interactive, students will analyze and compare two-dimensional shapes, in different sizes and orientations, using informal language to describe their similarities, differences, attributes and other properties.