16
83 + 17 = 100
1
If a number is added to itself, it is twice that number → 18 ÷ 2 = 9 → 9 + 9 = 18
6
To make a whole number, you need to add the amount that is missing from 3 to reach the nearest whole number. In this case, 3 is already a whole number, so no additional amount needs to be added to make it a whole. Therefore, nothing needs to be added to 3 to make it a whole number.
You write: eight hundred and eighty dollars. Always do it as close to the square where you write in the number and draw a line in front of the eight hundred. This way it can't be added to or changed to a higher number.
30 + 70 = 100
83 + 17 = 100
1
If a number is added to itself, it is twice that number → 18 ÷ 2 = 9 → 9 + 9 = 18
Placing a question mark at the end of a number does not make it a sensible question.
6
408 is the ans
21
56
To find the least number that should be added to 81180 to make it a perfect square, first, determine the square root of 81180, which is approximately 284.3. The next whole number is 285, and squaring it gives 81225. Therefore, the least number to be added is 81225 - 81180 = 45. Thus, 45 should be added to 81180 to make it a perfect square.
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