Decimals and percentages

Place value, decimal operations, percentages, increases and discounts

The Decimals and percentages unit belongs to the Fractions, decimals and finance section of Math Mental and has 19 lessons: place value, decimal operations, percentages, increases and discounts.

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Sample questions

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

$4.372 = 4 + \frac{3}{10} + \frac{?}{100} + \frac{2}{1000}$

Answer $7$
$3.1459 \approx$

Answer $3.15$
$0.6 \cdot 0.15$
Step by step
1. $\displaystyle \frac{6}{10} \cdot \frac{15}{100} = \frac{90}{1000}$
Answer $0.09$

Lessons in this unit

Tenths Lesson, 8 questions
Hundredths and thousandths Lesson, 8 questions
Comparing decimals Lesson, 8 questions
Rounding to the unit and the tenth Lesson, 8 questions
Times and divided by 10, 100 and 1000 Lesson, 8 questions
Times 0.1 and 0.01 Lesson, 8 questions
Adding and subtracting decimals Lesson, 8 questions
Multiplying decimals Lesson, 8 questions
Dividing decimals Lesson, 8 questions
Practice: decimals Practice, 12 questions
Percentage, decimal and fraction Lesson, 8 questions
50%, 25%, 10% and 1% Lesson, 8 questions
Any percentage Lesson, 8 questions
What percentage is it? Lesson, 8 questions
Whole from the part Lesson, 8 questions
Increase and discount Lesson, 8 questions
Percentage change Lesson, 8 questions
Review: percentages Practice, 12 questions
Unit test 15 questions

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Sample questions

Step by step

Lessons in this unit

Your first lesson takes five minutes