 # What Is The Rule For Multiplying By 10?

## How can I use patterns to multiply numbers by 10?

Patterns in Multiplying by 10’sAll multiples of 10 have a zero in the ones place.When multiplying by a 10, the other factor that was multiplied moves to the left one space (or one place value space to the left).All multiples of 10 are also multiples of 2 and 5.More items…•.

## How do you explain multiplying by zero?

If multiplication tells you how many times to add a certain number, then multiplying by 0 means that you have nothing to add because 0 means nothing. So, 3 * 0 means that you are adding 3 zero, or no, times.

## How do you work out 5 divided by 100?

5/100 = 120 = 0.05.

## What are multiples of 5?

The multiples of 5 are: 5,10,15,20,25,30,35,40,45,50,…

## What number is a multiple of 12?

The multiples of 12 are 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144,…

## What happens when you multiply a number by 10?

To multiply any number by 10, just tag ONE zero on the end. To multiply any number by 100, just tag TWO zeros on the end. To multiply any number by 1,000, just tag THREE zeros on the end. Note especially what happens when the number you multiply already ends in a zero or zeros.

## How do you teach multiplying by 10?

Multiplying by 1, 10, or 100When you multiply by 1 the answer stays the same. 21 × 1 = 21.When you multiply by 10, move all the digits one place to the left, putting a zero in the empty space. 21 × 10 = 210.When you multiply by 100, move all the digits two places to the left, putting a zero in the empty spaces.

## Is there a rule you can make for multiplying a number by a multiple of 10?

Now students will multiply using a multiple of 10 in the range 10–90. For example, the product of 4 × 80 can be shown as 4 groups of 8 tens, or 32 tens, or 320. This is a representation of the Associative Property of Multiplication, because 4 × 80 = 4 × (8 × 10) = (4 × 8) × 10 = 320.

## Why do you add a zero when multiplying by 10?

It’s almost taught like a sort of recipe but ‘adding a zero’ is like cooking the books, it’s maths fraud! … Imagine ‘adding a zero’ when multiplying 0.05 by 10. Pupils who have learned this rule might answer 0.050, or they could decide to add the zero somewhere else because they are unfamiliar with decimals.

## Why do you put a zero when multiplying?

There is one trick. When you multiply the second part, add a “0” to that answer, because you are multiplying the value from the tens column (the 2). If it’s from the tens, add a zero. If it’s from the hundreds, you would add two zeros.

## What happens when you divide a 2 digit number by 10 100 or 1000?

One place left for 10, two places left for 100 and three places left for 1000. When we divide by 10, 100 and 1000 we do the opposite and shift the digits to the right instead. Multiplication examples: To multiply by 100 move the digits to the left by two places.

## What can you multiply to get 100?

What are the Factors of 100Factors of 100 =1, 2, 4, 5, 10, 20, 25, 50, 100.Distinct Factors of 100 = 1, 2, 4, 5, 10, 20, 25, 50, 100,Factors of -100 = -1, -2, -4, -5, -10, -20, -25, -50, -100,