Ah, what a happy little number we have here! When we round 4.09 to the nearest whole number, it becomes 4. Just a gentle adjustment to keep things simple and easy to work with. Remember, there are no mistakes in rounding, just happy little approximations.
400
To round 409 to the nearest 10, we look at the digit in the tens place, which is 0. Since 0 is less than 5, we keep the hundreds place digit as it is and change all digits to the right of the tens place to 0. Therefore, rounding 409 to the nearest 10 gives us 410.
409 90/0.22 = 409 (almost)
Well, isn't that a happy little math problem! To find out what times what equals 409, we can break it down into factors. The factors of 409 are 1, 11, 37, and 409. So, 11 times 37 equals 407, and that's the magic combination we're looking for!
409 = 409/1