Determine whether the exercise is correctly written or not.
True or false:
The positions of the decimal points correspond.
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Determine whether the exercise is correctly written or not.
True or false:
The positions of the decimal points correspond.
First let's fill in the zeros in the empty spaces as follows:
Note that the decimal points are written one below the other.
Therefore, the positions of the decimal points correspond and thus the exercise is written in the correct form.
True
\( \text{0.6+0}.5= \)
Because decimal numbers need place value alignment! When you line up on the right, you might be adding tenths to hundredths, which gives the wrong answer.
Add trailing zeros to make them the same length! For example, 3.4 becomes 3.40 when adding to 21.52. This doesn't change the value, just makes alignment clear.
It's much safer to write them out! Writing prevents mistakes and makes the alignment obvious to check.
Draw an imaginary vertical line through all the decimal points. If they all line up perfectly on this line, your setup is correct!
You'll get the wrong answer! For example, treating 3.4 as 34 would give you 21.52 + 34 = 55.52 instead of the correct 24.92.
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