Example Question - solving arithmetic expression
Here are examples of questions we've helped users solve.
Solving an Arithmetic Expression
To solve the given expression: 21 + (-21) + (-4) First, add the positive and negative 21 together. This will cancel each other out because adding a number to its negative is equal to zero: 21 + (-21) = 0 Now you're left with: 0 + (-4) When you add zero to any number, the number remains unchanged. So the answer is simply: 0 + (-4) = -4 The result of the expression is -4.
Solving Arithmetic Expression Using PEMDAS
To solve the given expression, follow the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction): Given expression: 100 ÷ 2 - (12 + 13) + 7 Step 1: Solve the parentheses first: 12 + 13 = 25 Step 2: Now, the expression looks like this: 100 ÷ 2 - 25 + 7 Step 3: Next, divide 100 by 2: 100 ÷ 2 = 50 Step 4: Replace the division with its result: 50 - 25 + 7 Step 5: Now, perform subtraction and then addition (as they occur from left to right in the expression): 50 - 25 = 25 25 + 7 = 32 The value of the expression is 32, which corresponds to option (1).
Solving an Arithmetic Expression
To solve this expression, you should follow the order of operations, which is commonly known by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division from left to right, Addition and Subtraction from left to right). Given the expression: 8 ÷ 2(2 + 2) First, solve the operation inside the parentheses: 2 + 2 = 4 Then, you'll have: 8 ÷ 2 * 4 Since multiplication and division are of the same precedence, you perform them from left to right: 8 ÷ 2 = 4 Now multiply that result by the 4: 4 * 4 = 16 So, the answer is 16.
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