1.7 Add and Subtract Decimals Through the Thousandths

Front

What is the process for adding decimals?

Back

To add decimals, align the numbers by the decimal point, add the digits starting from the rightmost column, and carry over if necessary. Place the decimal point in the sum directly below the decimal points of the addends.

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point, subtract the digits starting from the rightmost column, and borrow if necessary. Place the decimal point in the difference directly below the decimal points of the numbers being subtracted.

Front

What is the value of 0.1 in terms of thousandths?

Back

0.1 is equivalent to 100 thousandths.

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal as a fraction with the decimal number as the numerator and a power of 10 as the denominator, then simplify if possible.

Front

What is the combined weight of two objects if one weighs 16.27 pounds and the other weighs 28.53 pounds?

Back

The combined weight is 44.80 pounds.

Front

If Dara spends $13.02, $9.85, and $15.20, how do you calculate her total spending?

Back

Add the amounts: 13.02 + 9.85 + 15.20 = 38.07.

Front

How do you find the change from a purchase?

Back

To find the change, subtract the total amount spent from the amount given. For example, if $50 is given and $38.07 is spent, the change is 50 - 38.07 = $11.93.

Front

What is the significance of aligning decimal points when performing operations?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate addition or subtraction.

Front

What is the total distance jogged if Jonas jogged 0.424 miles and has 0.384 miles left?

Back

The total distance is 0.424 + 0.384 = 0.808 miles.

Front

How do you determine which team won a race based on their times?

Back

To determine the winner, compare the total times of each team. The team with the lesser total time is the winner.