Write a decimal subtraction equation that requires regrouping from the tenths. explain how you know you will need to regroup.

1)For example we need to find 54 -41.2

Step 1: Write down the both numbers, one under the other, with the once digit in same line.

54

-41.2

Step2: Now,add zeros so the numbers to make the same length .

54.0

-41.2

Step3: Then subtract normally, remembering to put the decimal point in the answer

54.0

-41.2

12.8

2)Here we need to subtract same place values of second number from the first number starting from right side, We can see to subtract 2 from 0 we need to take carry from 4 (4 will become 3)so that it will become 10 to subtract 2 from it ,thus we get our answer 12.8.