To simplify the expression \((1.9 - 0.3) \div 8 + 4 \times 3\), we will follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).
Step 1: Simplify inside the parentheses
First, we need to calculate \(1.9 - 0.3\): \[ 1.9 - 0.3 = 1.6 \]
Step 2: Rewrite the expression
After solving the parentheses, we can rewrite the expression: \[ (1.6) \div 8 + 4 \times 3 \]
Step 3: Perform the division
Next, we perform the division: \[ 1.6 \div 8 = 0.2 \]
Step 4: Rewrite the expression again
Now our expression looks like this: \[ 0.2 + 4 \times 3 \]
Step 5: Perform the multiplication
Now, we will perform the multiplication: \[ 4 \times 3 = 12 \]
Step 6: Rewrite the final expression
Now we can rewrite the expression again: \[ 0.2 + 12 \]
Step 7: Perform the addition
Finally, we perform the addition: \[ 0.2 + 12 = 12.2 \]
Final Result
Thus, the simplified result of the expression \((1.9 - 0.3) \div 8 + 4 \times 3\) is: \[ \boxed{12.2} \]