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$3+2.5\times 5-4\times 8=$

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Add and subtract positive and negative decimals

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Q.

3+2.5\times 5-4\times 8=

Perform Multiplication: According to the order of operations (PEMDAS/BODMAS), we first need to perform the multiplication before addition and subtraction. $\newline$ Calculate $2.5 \times 5$ and $4 \times 8$ . $\newline$ $2.5 \times 5 = 12.5$ $\newline$ $4 \times 8 = 32$
Substitute Results: Now, substitute the results of the multiplication back into the original expression. $\newline$ The new expression is $3 + 12.5 - 32$ .
Addition and Subtraction: Perform the addition and subtraction from left to right. $\newline$ First, add $3$ to $12.5$ . $\newline$ $3 + 12.5 = 15.5$
Final Result: Subtract $32$ from the result of the previous step. $\newline$ $15.5 - 32 = -16.5$

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