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Due to the fact that the exercise only involves addition and subtraction operations, we will solve it from left to right:
\( 0:7+1= \)
Because the order matters! The expression 21-3-6+9-5 means you must follow the sequence exactly as written. Rearranging changes the problem completely.
Write down every single calculation! Even simple ones like 21-3=18. This prevents errors and makes it easy to find mistakes if your final answer is wrong.
You could combine like terms: , but the left-to-right method is safer and less error-prone for beginners.
Since this expression only has addition and subtraction, they have equal priority. Always work from left to right when operations have the same precedence level.
Double-check each step! The most common errors are: mixing up signs, skipping steps, or not following left-to-right order. Redo each calculation carefully.
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