45
15+15+15+15=60
add 9 add 1 subtract 20 add 9 add 1
15
how much do you need to add to 15 to make it 60
They add up to 7/15 pus 2/15 = 9/15 or 3/5 in its simplest form
15+15+15+15=60
15 add 20 = 35
7 + 15 + 28 = 50
add to 15 and subtract to 7
add 9 add 1 subtract 20 add 9 add 1
15
how much do you need to add to 15 to make it 60
Add 15 to itself. Add another 15. Keep adding 15. Multiples are multiple additions.
They add up to 7/15 pus 2/15 = 9/15 or 3/5 in its simplest form
12+9=21 21+15=36 36+13=49 49+6=55
19
The two numbers that multiply to -15 and add up to 2 are 5 and -3. When you multiply 5 and -3, you get -15, and when you add them together, you get 2.