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Magazine Chapter 1: Q23. (page 52)
Evaluate the expression.
Short Answer
Answer is 21
Step by step solution
Step 1: What is an integer?
Integers are two types one is positive and other is negative integers.
On a number line, the negative integers are to the left of the zero and the positive integers are to the left of zero.
Integers come in 'opposite pairs;'
For example, the opposite of +12 is 鈥� 12. This is because they are both equal distance from the zero on the number line.
Example on number line:
is the opposite of :
3 is opposite of
Step 2: Rules of Multiplication of Integers
RULE 1: The product of a positive integer and a negative integer is negative.
RULE 2: The product of two positive integers is positive.
RULE 3: The product of two negative integers is positive.
Rules of Division of integers
RULE 1: The quotient of a positive integer and a negative integer is negative.
RULE 2: The quotient of two positive integers is positive.
RULE 3: The quotient of two negative integers is positive.
Evaluate the expression: 28 ÷ (5 – 1) x 3
To add two integers, we need to check the signs of those two integers.
Consider, the expression provided in the question:
To determine the value of , at first we will evaluate expressions inside the grouping symbol. Then the result is to be dividing from left to right. Then lastly, the result is added and subtracted from left to right
The expression will be obtained as:
Hence,
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