Download 10 - 5 = 5 -> here “-” is the operation sign 10 + (-5)

10 - 5 = 5 -> here “-” is the operation sign
10 + (-5) = 10 -> here “-” is algebraic sign
The name of the Operation sign
operation
Example
Grade 6
How to read
How
to
name the
result
Addition
The operation sign is + , and 10+5=15 10 plus 5 equals Sum, total
is called the plus sign
15
Subtraction
The operation sign is − , and 10-5=5
10 minus 5 Difference
is called the minus sign
equals 5
Multiplication The multiplication sign in 2X5=10 2 times 5 equals Product
algebra is a centered dot or
10
multiplication cross x.
2 multiplied by 5
equal to
Division
The horizontal division bar 10
10 divided by 2 Quotient
2
is 5
10 over 2 is
equal to 5
This sign “=” is the equal sign, and we read this a = b -- as "a equals (or is equal to) b."
The wavy equal sign (≈) means "is approximately equal to."
Involution = raising to the power
Parentheses signify that we should treat what they enclose as one number.
Arithmetic Sequence is a sequence of numbers that has a constant difference between every
two consecutive terms.
Number sequence is an orderly set of numbers, arranged in such a way that each number in
the sequence is defined by a fixed rule or law, related to the position in the sequence or the
previous number, or numbers, in the sequence
Fibonacci sequence 1 1 2 3 5 8 13 21…..
The term is the component (element, member) of a number sequence
To round the number is to approximate a number to its nearest place value.
To round (approximate) the number you need:
1) Identify the last digit up to which the rounding is to be done (125.89
134,09)
2) Increase that digit by 1 if the next digit is greater than 5 (or leave it the
same if it is less than 5) and replace all the following by 0 (125.89
129,9 134.09
130)
Decimal
number
Mixed number
Fraction
Proper fraction: numerator is less than the denominator.
Improper fraction: numerator is greater than or equal to denominator.
Equivalent fractions: fractions that represent same number, equal fractions
The numbers expressed in the decimal form are called decimal numbers or decimals.
A mixed number consists of a whole-number part and a fractional part
The reciprocal of a number is one divided by that number.
Simplifying (or reducing) fractions means to make the fraction as simple as possible.
Recurring Decimal (repeating decimal) is a decimal in which a digit or a sequence of digits
̅)
keeps repeating (1,7888888 … = 1,7(8) = 1,78̇ = 1,78
Terminating Decimal is a decimal in which there are no repeating digit or a sequence of digits
A ratio is a way of comparing two or more numbers or quantities
To simplify the ratio - to rid of the highest common factor of the components (by division)