Final answer:
To make the number sentence 1 + 2 X 3 X 4 = 28 true, insert parentheses around 2 X 3 X 4 to change the order of operations. The simplified expression is then substituted back into the original equation.
Step-by-step explanation:
To make the number sentence 1 + 2 X 3 X 4 = 28 true, we need to insert parentheses to ensure the correct order of operations. The multiplication needs to be done before the addition. We can insert parentheses around 2 X 3 X 4, like this: 1 + (2 X 3 X 4). Now, we can simplify the expression inside the parentheses first: 2 X 3 X 4 = 24. Substituting this back into the original equation, we have 1 + 24 = 25. Therefore, the correct parentheses would be: 1 + (2 X 3 X 4) = 25.