Your First Answer
Part of the Numbers & Operations section of Coddy's Pre-Algebra journey. Lesson 1 of 60.
Welcome to Pre-Algebra. This course builds the number skills that algebra stands on: negative numbers, the order of operations, powers, roots, fractions, decimals and percents. Every idea comes with a worked example, a short quiz, and a problem you solve yourself.
Problems live on a board. The board shows the problem, keeps every line you write, and checks each step the moment you make it. When the problem is finished, you press Check and the board confirms the answer.
Challenge
Tap the move under the problem to work out 12 + 30, then press Check.
Try it yourself
Simplify the expression
All lessons in Numbers & Operations
1Working on the Board
Your First AnswerType the Next LineOne Line at a TimeDots and BarsFriendly ProductsRecap: Board Work4Adding Integers
Adding Two NegativesDifferent SignsZero PairsAdding Several IntegersRecap: Adding Integers2Order of Operations
Multiply Before AddingLeft to RightParentheses FirstBrackets Inside BracketsThe Fraction Bar GroupsRecap: Order of Operations5Subtracting Integers
Add the OppositeSubtracting a NegativePlus and Minus in a RowDistance Between NumbersRecap: Subtracting Integers