Operations with whole numbers
Inverse operations with whole numbers: find a missing number, check an answer and work backwards. Then follow the order of operations with brackets.
Available exercises
Find the missing number — inverse operations
Find the missing number in an equation using the inverse operation.
Check the answer with the inverse operation
Check a calculation by using the inverse operation.
Think of a number — work backwards
Find the starting number of a chain of steps by working backwards.
Evaluate an expression
Compute the value of an expression following the order of operations (PEMDAS).
Do we need brackets?
Given an expression and a target value, decide whether parentheses are needed.
Match the expression to the words
Read a phrase in words and pick the matching expression.