observ the following pattern 2-1=1+2*1*3 2 and 1 cube h means unko three bar multiply krna h
Answers
Answer:
For all real numbers a, |a| (pronounced ‘absolute value of a’), is the positive magnitude of a.
So |6|=6, |100|=100, |-6|=6, |-100|=100
So |a|=a if a is positive, |a|=-a if a is negative, |a|=0 if a=0.
So |3|=3 and |-3|=3
An intuitive way of looking at absolute value is to consider that the absolute value of a real number is its distance from zero on the number line. For example:
Addition of:
Whole numbers: Addition is an operation of composition. On whole numbers, addition may be described as the joining of disjoint sets. In a physical model it is represented by the bringing together of objects. Initially it involves counting the objects in the joined set to determine the sum, or result, of the operation. When the basic addition facts are known, more complex addition problems can be answered using additive strategies.
Addition is a binary operation, that is, it is an operation on two numbers.
Addition is commutative, that is, the order of the numbers does not change the answer. For example, 4+5 = 5+4.
Addition is associative, that is, the grouping of the numbers does not affect the answer. For example, (2+3)+5 = 2+(3+5).
Zero is the identity element for addition, because the addition of zero to a number does not change it.
Fractions: Fractions may be added. If their denominators are the same then we can simply add the numerators to obtain the sum. For example, 2/9 + 4/9 = 6/9. If their denominators are not the same then we must choose equivalent fractions so that their denominators are the same. For example, to add 1/6 and 1/4 we must find equivalent fractions for 1/6 and 1/4 that have a common denominator. We could multiply the two denominators, 6 and 4, and that process would always give us a common denominator. However, we might observe that the least common multiple of 6 and 4 is actually 12.
1/6 = 2/12, 1/4 = 3/12, so 1/6 + 1/4 = 5/12.
Decimals: Decimal fractions (commonly called decimals) may be added in the same way that whole numbers are, with care being taken to consider the position of the digits in the decimal. So, for example, tenths are added to tenths, hundredths to hundredths, etc. We can add the decimals because they represent fractions whose denominators are the powers of 10. For example, 2.4 = 2 + 4/10 and 3.56 = 3 + 5/10 + 6/100 so the 4/10 can be added to the 5/10 because they already have the common denominator of 10.
Percentages: Percentages may be added as if they were whole numbers or decimals. For example, 8% + 23% = 31%, 2.6% + 3.1 % + 120% = 125.7%. At an abstract level, a percentage is a numeral representing a number and therefore, just like decimals, they may be added. Care must be taken however because of the way that society uses percentages. One often refers to a percentage of something and that can lead to difficulties. For example, although it is true that 5% of 80 plus 10% of 80 is 15% of 80, it is not true that 5% of 80 plus 10% of 60 is 15% of either 80 or 60.
Integers: Integers may be added by observing the following rule:
a+-b=a–b. For example, 4+-3 = 4–3 = 1.
This rule, and similar rules for subtraction are best discovered using models, such as a black-and-white counters model, in which a white counter represents one, and a black counter represents -1. The first thing to establish is that opposites cancel. So, for example, 1+-1=0.
The properties of addition outlined for whole number also apply to the addition of fractions, decimals, percentages and integers.