Which of the following expressions correctly use mental math to find 4 x 59? Select all that apply.

Question

(1 point)
O (4 × 60) - (4 x 1)
04× (50 × 9)
O 4 + (50 × 9)
V (4 × 50) + (4 × 9)
04+50+9

Answer 1

To determine the mental math expressions that correctly find \(4 \times 59\), let's analyze each option:

1. (4 × 60) - (4 x 1)

   • This calculates \(4 \times 60 = 240\) and \(4 \times 1 = 4\). Thus, \(240 - 4 = 236\), which is correct since \(4 \times 59 = 236\).

2. 04× (50 × 9)

   • This seems to be incorrectly formatted. Assuming you meant to write \(4 \times (50 + 9)\), then this would calculate as \(4 \times 59 = 236\). However, as it is, it's not valid.

3. O 4 + (50 × 9)

   • This represents \(4 + (50 \times 9) = 4 + 450 = 454\), which is incorrect.

4. (4 × 50) + (4 × 9)

   • This expands to \(4 \times 50 = 200\) and \(4 \times 9 = 36\). Thus, \(200 + 36 = 236\), which is correct.

5. 04 + 50 + 9

   • This adds up to \(4 + 50 + 9 = 63\), which is incorrect.

The correct options that use mental math to find \(4 \times 59\) are:

• (4 × 60) - (4 x 1)
• (4 × 50) + (4 × 9)

So, the correct answers are the first and fourth expressions.