Anima

If I give you one apple, then I give you another apple, how many apples have I given you?

2 apples

Anything times one is itself so 

1

This always helped me. Lets ignore the whole numbers until the very end so we end up with 3/5-1/3.

With adding and subtracting, you have to have the same denominator so what can we multiply to each denominator to make them the same. Usually you want the lowest number so you have less simplifying at the end. 

What we can do is 5*3 and 3*5. whatever you multiply the bottom with you have to multiply the top with, so 3*3 and 3*5 for the first one and it would come out as 9/15 and for the second one it would be 1*5 and 3*5 and it would come out as 5/15.

Your equation now is 9/15-5/15. For addition and subtraction you keep the denominator the same so you would only do 9-5=4

So your equation now is 4/15. Now go on to your whole numbers basically you just do 4-2=2

If you add those two solutions together you get 2 4/15

Anything times 1 is the number you multiplied, so 10

example: 9*1=9

8*1=8

You can simplify this but you cannot solve it completely without the values for a and b. Basically all you have to do in this problem is add the two a's together so you have:

1+1/5a+3/5b+4/5a

1/5a+4/5a= 5/5a= a

1+a+3/5b 

1954440 Use a calc next time

If you have 10 and a single digit number just add a one to that single digit number. 19

Well if you wanna do it by hand, just do the stacking thing. Maybe try again, see if you did something wrong?

$${\mathtt{17.34}}{\mathtt{\,\times\,}}{\mathtt{13}} = {\mathtt{225.42}}$$

    17.34

x  13

------------

3*4= 12  3*3+1=10 7*3+1= 22 3*1+2= 5

Your first line of Multiplying is 5202 (ignoring the decimal place for now)

Second line (dont forget the smiley face 0)

1*4=4 1*3=3 1*7=7 1*1=1

Your second line looks like 17340

Now whats 17340+5202=22542

Now add the decimal places in, two from the right

225.42 and i checked the calculator and thats right

I don't see how the last equation relates to the other two, but the other ones can be pretty easy take this for example

10+3=13

3-13=10

It acually quite basic, I don't know a better way to explain it