Question

estimate
4.58 × 3.83
25 9
20 10

Explanation:

Step1: Round the numbers

Round \( 4.58 \) to the nearest whole number, which is \( 5 \), and round \( 3.83 \) to the nearest whole number, which is \( 4 \). But wait, maybe a better estimate for \( 4.58 \) is \( 4.5 \) or just round to the nearest integer. Wait, actually, \( 4.58 \approx 5 \) and \( 3.83 \approx 4 \), but maybe another way: \( 4.58 \approx 4.6 \), \( 3.83 \approx 3.8 \), but maybe the problem expects rounding to nearest integers or to one decimal. Wait, but looking at the options, 25,9,20,10. Wait, maybe I made a mistake. Wait, \( 4.58 \) is close to \( 5 \), \( 3.83 \) is close to \( 4 \), but \( 5\times4 = 20 \)? No, wait \( 4.58 \approx 4.6 \), \( 3.83 \approx 3.8 \), but maybe the problem is to round to the nearest whole number as \( 5 \) and \( 4 \), but \( 5\times4 = 20 \)? Wait, no, wait \( 4.58 \) is about \( 4.6 \), \( 3.83 \) is about \( 3.8 \), but maybe the intended rounding is \( 4.58 \approx 5 \), \( 3.83 \approx 4 \), but \( 5\times4 = 20 \), or maybe \( 4.58 \approx 4.5 \), \( 3.83 \approx 4 \), \( 4.5\times4 = 18 \), not close. Wait, maybe the problem is to round \( 4.58 \) to \( 5 \) and \( 3.83 \) to \( 4 \), but the options have 20. Wait, or maybe \( 4.58 \approx 5 \), \( 3.83 \approx 4 \), \( 5\times4 = 20 \), so the estimate is 20? Wait, no, wait \( 4.58 \times 3.83 \). Let's calculate the actual value: \( 4.58\times3.83 \approx 4.58\times3.83 \). Let's compute \( 4\times3 = 12 \), \( 4\times0.83 = 3.32 \), \( 0.58\times3 = 1.74 \), \( 0.58\times0.83 \approx 0.4814 \). So total is \( 12 + 3.32 + 1.74 + 0.4814 = 17.5414 \), which is close to 20? No, 17.5 is close to 20? Wait, maybe the rounding is different. Wait, \( 4.58 \approx 5 \), \( 3.83 \approx 4 \), \( 5\times4 = 20 \), so the estimate is 20. So the answer should be 20.

Step2: Check the options

The options are 25,9,20,10. So 20 is one of the options. So the estimated value of \( 4.58\times3.83 \) is approximately 20.

Answer:

20