Arithmetic Operations Overview

15 Questions

Ποια από τις παρακάτω εκφράσεις αντιπροσωπεύει την πράξη της πρόσθεσης δύο ρητών αριθμών;

$\frac{1}{4} + \frac{3}{5}$

Αν έχουμε $\frac{2}{3}$ και $\frac{5}{6}$, ποιο από τα παρακάτω αντιπροσωπεύει το άθροισμά τους;

$\frac{13}{6}$

Ποια από τις παρακάτω εκφράσεις δεν αντιπροσωπεύει την πρόσθεση δύο ρητών αριθμών;

$2^3 + 3^2$

Αν $\frac{a}{b}$ και $\frac{c}{d}$ είναι ρητοί αριθμοί, ποια από τις παρακάτω εκφράσεις αντιπροσωπεύει το άθροισμά τους;

$\frac{ad + bc}{bd}$

Ποια από τις παρακάτω εκφράσεις είναι ισοδύναμη με $\frac{1}{2} + \frac{1}{3}$;

$\frac{5}{6}$

Ποιο είναι το αποτέλεσμα της προσθήκης -4 + 7;

Τι γίνεται όταν προσθέσουμε -9 + 5;

-14

Ποιο από τα παρακάτω δείγματα είναι μηδέν μετά τη συνολοθέτη πράξη: -6 + 4;

Ποιο είναι το αποτέλεσμα της προσθήκης -8 + (-3);

-11

Εάν προσθέσουμε -2 + 8, ποιο είναι το αποτέλεσμα;

$7 + 9$;

$16$

;

$-7 + 9 = 2$

$-4 + 6$;

$-2$

$-6 + (-8)$;

$-14$

$-5 + 10$;

$5$

Study Notes

Arithmetic Operations

Arithmetic operations involve mathematical processes such as addition, subtraction, multiplication, division, exponentiation, square roots, and logarithms. These operations form the foundation of algebraic manipulation, mental arithmetic, real number arithmetic, and numerical analysis. Let's discuss each operation in detail:

Addition

Addition is the process of combining two or more numbers into a single entity called their sum. For example, if you have 5 apples and you get 3 more, you now have 5 + 3 = 8 apples. There are several ways to perform addition, including vertically while carrying over, horizontally without any column resets, and using a calculator.

Subtraction

Subtraction involves removing one or more quantities from another quantity. It can be represented mathematically by the minus sign (-) or as borrowing in the case of paper-and-pencil calculation. For instance, if you start with 7 candies and eat 4, you will be left with 7 - 4 = 3 candies.

Multiplication

Multiplication is the process of finding the product of two quantities, which means adding together a certain number of copies of the first quantity. If you have 4 chairs and there are also 3 tables, then you have 4 x 3 = 12 pieces of furniture. This concept extends beyond simple counting, leading to complex mathematical theories like linear algebra.

Division

Division refers to splitting a whole into parts equal in size, or the inverse of multiplication. In other words, it determines how many times one number goes into another. For example, dividing 12 pizzas equally among 4 people would mean sharing 12 / 4 = 3 pizzas per person. Even though we usually focus on integers, rational numbers are often used when dealing with fractions and division.

Exponentiation

Exponentiation is the raising of a number to a power or multiplying a number by itself several times. For example, if you roll a die 6 times, the outcome could be one of six possibilities raised to the sixth power. In this context, "power" doesn't necessarily mean strength; instead, it refers to repeated multiplication of the base number. Thus, 2^3 = 2 * 2 * 2 = 8.

Square Roots

The square root of a nonnegative real number is the value that, when squared, equals the original number. As an example, the square root of 9 is 3 because 3 * 3 = 9. However, negative numbers don't have real solutions under ordinary arithmetic, so the square root of -1 is undefined in the ordinary meaning of the term.

Logarithms

Logarithms represent the inverse function to exponentiation. A common logarithm is simply the base 10 logarithm. For example, since 10^2 = 100, the logarithm to base 10 of 100 is 2. Similarly, since 10^3 = 1000, the logarithm to base 10 of 1000 is 3.

These arithmetic operations play a crucial role in mathematics and various fields, enabling us to solve problems efficiently and accurately.