Solve the following exercise:
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Solve the following exercise:
To avoid confusion in solving the exercise, we'll first add the digit 0 to the number 3.212 in the following way:
Now let's solve the exercise in order:
Let's multiply the ten-thousandths after the decimal point:
Let's multiply the thousandths after the decimal point:
Let's multiply the hundredths after the decimal point:
Let's multiply the tenths after the decimal point:
Finally, let's multiply the whole numbers before the decimal point:
And we obtain the following:
5.3132
Choose the correct writing form:
Adding zeros helps you line up place values correctly. When you write 3.212 as 3.2120, you can clearly see that 2.1012 + 3.2120 aligns perfectly for column addition.
No! Adding zeros to the right of a decimal doesn't change the value. 3.212 = 3.2120 = 3.21200. It's like saying 5 dollars equals 5 dollars and 0 cents.
Count the digits after the decimal point. 2.1012 has 4 decimal places, while 3.212 has 3 decimal places. Always match the shorter one to the longer one.
Your answer will be completely wrong! For example, if you don't align properly, you might get 5.3213 instead of the correct answer 5.3132. Always double-check your alignment.
It's much easier to add from right to left (smallest place value first), just like with whole numbers. This prevents confusion and makes carrying over simpler.
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