Beth decided to first subtract 1 from both numbers
when she was calculating .
a. Write down the new problem and solve it.
Explain why Beth would use this method.

Beth’s new problem would be . When you perform this subtraction, you’ll get .

Beth likely used this method as a way to simplify the calculation. By subtracting 1 from both numbers, she kept the numbers close to their original values while making the numbers slightly easier to work with, especially when dealing with carrying in subtraction. This technique can help avoid mistakes that sometimes arise with larger digits.