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Numbers and Decimals

Numbers and Decimals

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Basic Arithmetic

Math Angel video: Number line showing positive and negative numbers, labeled origin, equal intervals, and tips for comparing values on a number line.
Grade 7

Number Line and Comparing Numbers

A number line is a visual tool that represents numbers in order on a straight line. Learn how to use…
Math Angel video: Place value chart breaking down the number 54321 into ten thousands, thousands, hundreds, tens, and ones columns for easy understanding.
Grade 7

Place Value and Rounding Numbers

Place value shows the value of each digit in a number. Round down if the digit is less than 5, and …
Math Angel video: Visual explanation of 6 + 6 + 6 = 18, highlighting each summand and the total sum for clear math understanding.
Grade 7

Basic Arithmetic and Inverse Operations

Basic arithmetic includes 4 math operations: addition, subtraction, multiplication, and division…
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Factors and Multiples

Math Angel video: Illustration explaining divisibility—using bananas to show 9 divided by 2 (with remainder) and 9 divided by 3 (no remainder).
Grade 7

Divisibility and Divisibility Rules

Learn divisibility rules with clear examples. A number is divisible by 2 if its last digit is even…
Math Angel video: Explanation and example of prime numbers, highlighting that 2 is the smallest prime number for easy math understanding.
Grade 7

Prime Numbers and Prime Factorization

Prime numbers have exactly two factors: 1 and the number itself. Learn prime factorization to find…
Math Angel video: Method for finding HCF and LCM by listing factors and multiples, with example HCF of 6 and LCM of 36 explained clearly.
Grade 8

How to Find HCF and LCM

Highest Common Factor (HCF) is the greatest factor shared by numbers, and Lowest Common Multiple…

Powers and Roots

Math Angel video: Explains base 3 and index 4 in 3^4, showing how to pronounce it as "three to the power of four" for exponents understanding.
Grade 7

Powers and Indices

Learn powers and indices, like 5³, where 5 is the base and 3 is the index or exponent. Discover…
Math Angel video: Examples of square roots of 9 and 25, explained as non-negative numbers that, when squared, return the original number.
Grade 11

Basics of Square Roots

The square root of a number is a non-negative value that, when squared, equals the number that…
Math Angel video: Simplifying root calculations for multiplication and division, showing rules and conditions for a and b in clear math examples.
Grade 11

Multiplying and Dividing Square Roots

Learn the formulas for multiplying and dividing square roots and how to use them to simplify root…
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Decimals

Math Angel video: Place value chart introducing decimals, sorting digits from hundreds to thousandths, with 12.345 split into whole and fractional parts.
Grade 8

Decimals and Fractions

Decimals are numbers with a whole part and a fractional part separated by a decimal point. Learn to …
Math Angel video: Decimal places and place value chart for 12.348, highlighting tenths, hundredths, and thousandths with clear visual illustrations.
Grade 8

Comparing and Rounding Decimals

Rounding decimals is easy—check the digit to the right of your target place: round up if 5 or more, …
Math Angel video: Shifting the decimal point in division and multiplication—decimal moves left for division, right for multiplication, with clear examples.
Grade 8

Movement of the Decimal Point

When multiplying decimals by 10, 100, or 1000, move the decimal point 1, 2, or 3 places to the right…
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Negative Numbers

Grade 9

Rational Numbers and their location on a Number Line

What are rational numbers, their difference from irrational numbers, and how to represent them on a…
Math Angel video: Number line from -5 to 5 showing negative, positive numbers, and zero as neutral, labelled "Understanding Negative Numbers" for clarity.
Grade 9

Adding and Subtracting Negative Numbers

Add and subtract negative numbers using a number line and rules for removing brackets when working…
Math Angel video: Sign rules for multiplying and dividing negatives—odd number of negatives gives negative, even number gives positive result, with examples.
Grade 9

Multiplying and Dividing Negative Numbers

Multiply and divide negative numbers using sign rules. Learn how an odd or even number of negatives …

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Basic Arithmetic
Factors and Multiples
Powers and Roots
Decimals
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