 With the addition of Hundreds, you must add up a multiple of $$100$$ to another multiple of $$100$$ and use facts to do the addition of $$2$$ multiples of $$100$$.

## How to do addition of Hundreds

Step one: Put one numeral above the other numeral so the hundreds’ position figures, the tens’ position figures as well as the ones’ position figures get lined up. Place a plus sign $$(+)$$ to the left of these numerals. As an alternative to an equal sign $$(=)$$, place a line under the lower numeral.

Note: Whenever you stack this type of addition expression, be certain these numbers line up properly. These numbers ought to always get lined up on the right.

Step two: Add both ones’ position numerals. $$(0 + 0 = 0)$$. And put the resulting answer under the line.

Step three: Add the numerals in the tens’ spot column $$(0 + 0 = 0)$$ then put the answer under the line and to the left of the ones’ spot sum.

Step four: Add the numerals in the hundreds’ spot column then out this answer under the line and to the left of the tens’ spot sum.

As you saw, that signifies you always begin via adding all the numbers on the right.

### Addition of Hundreds – Example 1:

Add: $$100+200$$

Solution:

First line up the numbers: $$\begin{array}{r} &100\\ +\!\!\!\!\!&200\\ \hline \end{array}→$$ Add the numerals in the ones’ spot column $$(0 + 0 = 0)$$ and put the resulting answer under the line. $$\begin{array}{r} &100\\ +\!\!\!\!\!\!&200 \\ \hline \end{array} \\ \ \ \ \ \ \ \ \ \ \ \ 0$$ , Continue with tens’ place. $$0 \ + \ 0=0$$, $$\begin{array}{r} &100\\ +\!\!\!\!\!\!&200 \\ \hline \end{array} \\ \ \ \ \ \ \ \ \ 0$$. Add the numerals in the hundreds’ spot column then out this answer under the line . $$1 \ + \ 2=3$$, $$\begin{array}{r} &100\\ +\!\!\!\!\!\!&200 \\ \hline \end{array} \\ \ \ \ \ \ \ 300$$

### Addition of Hundreds – Example 2:

Add: $$300+400$$

Solution:

First line up the numbers: $$\begin{array}{r} &300\\ +\!\!\!\!\!&400\\ \hline \end{array}→$$ Add the numerals in the ones’ spot column $$(0 + 0 = 0)$$ and put the resulting answer under the line. $$\begin{array}{r} &300\\ +\!\!\!\!\!\!&400 \\ \hline \end{array} \\ \ \ \ \ \ \ \ \ \ \ \ 0$$ , Continue with tens’ place. $$0 \ + \ 0=0$$, $$\begin{array}{r} &300\\ +\!\!\!\!\!\!&400 \\ \hline \end{array} \\ \ \ \ \ \ \ \ \ 0$$. Add the numerals in the hundreds’ spot column then out this answer under the line . $$3 \ + \ 4=7$$, $$\begin{array}{r} &300\\ +\!\!\!\!\!\!&400 \\ \hline \end{array} \\ \ \ \ \ \ \ 700$$

## Exercises for Addition of Hundreds

1. $$\color{blue}{700+100}$$
2. $$\color{blue}{500+400}$$
3. $$\color{blue}{300+800}$$
4. $$\color{blue}{200+600}$$
1. $$\color{blue}{800}$$
2. $$\color{blue}{900}$$
3. $$\color{blue}{1,100}$$
4. $$\color{blue}{800}$$

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