1.) You could do this by adding 4 3/4 to itself five times and get the answer but it is easier to multiply , which is what we do when we want to repeatedly add.
5 * 4 3/4 change 4 3/4 to 19/4. Multiply 19 by 5, divide the result by 4 and you will get the answer.
2.)5(4 3/4) = 5(4) + 5(3/4)
Logic says this will be around 23 to 24 since
5(4) = 20 and 5(1/2) = 2 1/2 so it must be a bit
more than 22 1/2 At a simple guess
the only choice that makes sense is 23 3/4 ...
5(4 3/4) = 5(19/4) = 95/4 = 23 3/4
Keep Working!!! =)