Solve: Adding Decimal Numbers 321.301 + 210.1

To avoid confusion in solving the exercise, we will first add two zeros to the number 210.1 as follows:

$321.301\\+210.100\\$

Now let's solve the exercise in order:

Let's connect the thousandths after the decimal point:

$1+0=1$

Let's connect the hundredths after the decimal point:

$0+0=0$

Let's connect the tenths after the decimal point:

$3+1=4$

Finally, let's connect the whole numbers before the decimal point accordingly:

$1+0=1$

$2+1=3$

$3+2=5$

And we get:

$321.301\\+210.100\\531.401$