# Why are numbers that have 0 in the ones column divisible by 10?

Effectively when you divide by 10, you move the decimal point one place to the left. Imagine if every integer has a decimal component of 0, therefore, 70.0 / 10 = 7.00.

Similarly, but using an incompatible example, 74.0 / 10 = 7.40, which is not an integer.

### How many numbers between 1 and 100 have 5 ones?

None. No number between 1 and 100 has 5 of any digit. This is incorrect. The question asks how many has five ones, not digits. the number five has five ones in the ones column the number 50 has five tens in the tens column. so the answer is 10: 5,15,25,35,45,55,65,75,85,95. Al these numbers have five ones in the ones column.

### What are the rules for adding whole numbers?

You start at the right hand most number. This is the ones position. Add the given numbers and carry if you need to as is mentioned in the next sentence. Add the numbers to the left of the ones. These are the tens. Carry from the first step any numbers you need. You need to carry from the first step if when you added those numbers in the ones place, the total was more than…

### What are the divisibility rules for 1 2 3 4 5 6 9 and 10?

All whole numbers are divisible by 1. Numbers are divisible by 2 if they end in 2, 4, 6, 8 or 0. Numbers are divisible by 3 if the sum of their digits is divisible by 3. Numbers are divisible by 4 if the last two digits of the number are divisible by 4. Numbers are divisible by 5 if the last digit of the number is either 5 or 0. Numbers are divisible by…

### Is 712 divisible by 2 3 4 5 6 10?

712 is divisible by 2 because the digit at ones place is an even number. 712 is not divisible by 3 because the sum of the numbers(7+1+2=10) is not divisible by 3. 712 is divisible by 4 as the last two digits(12) are divisible by 4. 712 is not divisible by 5 because the last digit is neither 5 nor 0. 712 is not divisible by 6 because it is not divisible by 3. 712…

### Why a number with 0 in the ones place is divisible by 10?

The number immediately to the left of the ones place is the tens place or the 101 place. Since the value of any digit, d, there would be d*101 = d*10, it will be divisible by 10. The next number to the left is the hundreds place or the 102 place. Since the value of any digit, d, there would be d*102 = d*100, it will be divisible by 10. All the numbers further to…