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The value of 48÷[4×(65+1)]÷24 -48 \div [4 \times (6 - 5 + 1)] \div 24:

A12

B-7/4

C-1/4

D-9

Answer:

C. -1/4

Read Explanation:

Step 1: Solve the innermost round parentheses (65+1)(6 - 5 + 1)

Work from left to right for subtraction and addition:

* 65=16 - 5 = 1

* 1+1=21 + 1 = 2

The expression becomes:

48÷[4×2]÷24-48 \div [4 \times 2] \div 24

Step 2: Solve the square brackets [4×2][4 \times 2]

* 4×2=84 \times 2 = 8

The expression becomes:

48÷8÷24-48 \div 8 \div 24

Step 3: Solve the divisions from left to right

First division:

* 48÷8=6-48 \div 8 = -6

Now, perform the final division:

* 6÷24=624-6 \div 24 = -\frac{6}{24}

Step 4: Simplify the fraction

* 624=14-\frac{6}{24} = -\frac{1}{4}


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