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Chapter 1: Q61. (page 14)

Write an expression using the whole numbers 1 to 5 using all five digits and addition and/or subtraction to create a numeric expression with a value of 3.

Short Answer

Expert verified

5鈭�4+3鈭�2+1

Step by step solution

01

Step 1. Apply the BODMAS rule.

According to the BODMAS rule of simplification, at first, the bracket operation must be completed followed division, by multiplication, addition, and finally subtraction.

02

Step 2. Example of applying BODMAS rule.

The expression can be written as

2.5(3鈭�2)鈭�10=2.5(1)鈭�10鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌�=(2脳5脳1)鈭�10鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌�=10鈭�10鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌�=0

03

Step 3. DESCRIPTION OF STEP.

A number of possible expressions can be written using the whole numbers 1 to 5 giving the value of 3. A few results are shown below:

  1. 5鈭�4+3鈭�2+1=1+1+1=3
  2. 1+5+3鈭�4+2=1+8鈭�6=9鈭�6=3
  3. 1+5鈭�4+2+3=6鈭�6+3=3
  4. 5鈭�2+4鈭�3鈭�1=3+1鈭�1=3

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F)鈥夆赌夆赌夆赌夆赌夆赌夆赌夆赌夆赌�r49G)鈥夆赌夆赌夆赌夆赌夆赌夆赌�l+wH)鈥夆赌夆赌夆赌夆赌夆赌�2l+2wJ)鈥夆赌夆赌夆赌夆赌夆赌�4(l+w)

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