Question

How to add 3.4 plus 40

Answer 1

u have to line ur decimals up....and every whole number has a decimal following the last digit.
40 = 40.0

so line the decimals up...and once the decimals are lined up, any empty spaces, u can put a 0...if it is easier....let me show u

40.0
03.4
---------add
43.4

Answer 2

40+3.4= 43.4 is the answer you add the number that comes before the dot if there is no decimal addend