Arithmetic essentials,

In this topic, we will add and subtract whole numbers. The topic starts with 1+1=2 and goes through adding and subtracting within 1000. We will cover regrouping, borrowing, and word problems.

This course contains 8 segments:

Adding and subtracting is the basis of all mathematics. This tutorial introduces you to one-digit addition and subtraction.

Add and subtract numbers 20 or less. Find the missing number in addition and subtraction equations.

Strategies for adding and subtracting within 100

Learn strategies for adding and subtracting 2-digit numbers.

Learn to add two-digit numbers like 37 and 49.

Subtraction within 100

Learn to subtract two-digit numbers like 47 and 39.

Word problems within 100

Learn how to solve addition and subtraction word problems. Numbers used 100 or less.

Learn how to add numbers like 259 + 363. These addition problems are a harder than the ones we've done before because they require regrouping (also called carrying).

Multi-digit subtraction with regrouping

Learn how to subtract numbers like 363 - 259. These subtraction problems are a harder than the ones we've done before because they require regrouping (also called borrowing).

Rating Not enough ratings 8 segments On Demand (Start anytime) Free Khan Academy On all desktop and mobile devices English Mathematics Math

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