13×12-26×4+43×7,简便运算?
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To simplify this calculation, we can use the order of operations, also known as PEMDAS:
1. Parentheses (or brackets)
2. Exponents (ie Powers and Square Roots, etc.)
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)
Using this rule, we perform multiplication and subtraction before addition:
13×12 - 26×4 + 43×7
= 156 - 104 + 301
Now, we can add and subtract from left to right:
= 52 + 301
= 353
Therefore, the simplified answer is 353.
1. Parentheses (or brackets)
2. Exponents (ie Powers and Square Roots, etc.)
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)
Using this rule, we perform multiplication and subtraction before addition:
13×12 - 26×4 + 43×7
= 156 - 104 + 301
Now, we can add and subtract from left to right:
= 52 + 301
= 353
Therefore, the simplified answer is 353.
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(12+1)*12-(25+1)*4+(40+3)*7
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