3.12+31.2+30 by using

Answer 1

To add the numbers 3.12, 31.2, and 30, you can simply line them up by their decimal points and then perform the addition:

    3.12
+ 31.20
+ 30.00
_________
  64.32

Now, let's break it down step by step:

1. Add the digits in the hundredths place: \(2 + 0 + 0 = 2\)
2. Add the digits in the tenths place: \(1 + 2 + 0 = 3\)
3. Add the digits in the units place: \(3 + 1 + 0 = 4\)
4. Add the digits in the tens place: \(0 + 3 + 3 = 6\) (since there's no other digit, we consider just the 3 from 31.20 and 30.00)

So when you total everything up, you get \(64.32\).

Therefore, \(3.12 + 31.2 + 30 = 64.32\).