Numerical expressions

Order of operations, parentheses, integers and powers

The Numerical expressions unit belongs to the Arithmetic and mental math section of Math Mental and has 11 lessons: order of operations, parentheses, integers and powers.

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Sample questions

In the lesson, numbers change every session and the solution appears after you answer.

$18 - 3 \cdot (4 - 2^2) + 6 \div 2$
Step by step
1. $\displaystyle 4 - 2^2 = 0$
2. $\displaystyle 18 - 0 + 3$
Answer $21$
$2^{5} \cdot 2^{-3}$
Step by step
1. $\displaystyle 2^{5 + (-3)} = 2^{2}$
Answer $4$

Lessons in this unit

Multiplication before addition Lesson, 8 questions
Four operations Lesson, 8 questions
Practice: order of operations Practice, 10 questions
Parentheses Lesson, 8 questions
Parentheses and brackets Lesson, 8 questions
Adding integers Lesson, 8 questions
Sign rules Lesson, 8 questions
Natural powers Lesson, 8 questions
Expressions with powers Lesson, 8 questions
Review: expressions Practice, 12 questions
Unit test 12 questions

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Sample questions

Step by step

Step by step

Lessons in this unit

Your first lesson takes five minutes