70
Half is the same thing as .5 so you divide 30 by .5 and you get 60 then you add 10 so it is 70. TADA!!!
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Seventy. 30 / .5 = 60; 60 + 10 = 70.
40
Any of them. To get 50 to 30 you could... subtract 20 add -20 divide by 5/3 multiply by 3/5
30. (Add them all together, then divide by 5, the number of items.)
By using the 30's and 50's common factors, which are 1, 2, 5, 10.
5, 10, 15, 20, 25, 30 Add them up. Divide that total by 6.
Same as average. For example, if you have 5 numbers, add them all up, then divide the result by 5. If you have 10 numbers, you add and divide by 10, etc.
It means you are counting in increments of 5. 5+5=10, 10+5=15. If by the word "mean", you are talking about the average, then the mean is 10. To determine the average of any group of numbers, add the numbers and divide the total by the number of numbers added - (does this makes sense?) Example: 5 + 10 + 15 = 30. Divide 30 by 3 (you added 3 numbers together to get the total) and the average is 10. Hope this helps.
1500 divided by 30 = 50= 1500/30 (the zeros are cancelled out)= 150/3 (divide 15 by 3; the quotient is 5 then add 0 to 5)= 50
No. These are the numbers that divide evenly into 30: 1 2 3 5 6 10 15 and 30.