Add Three Signed Decimals

Start with Add Signed Decimals to Tenths and Subtract Signed Decimals to Tenths, then move to hundredths. Use Add Three Signed Decimals for longer sums and the comparison sheet as a quick check on sign sense.

Add three signed decimals with different place values, like (-31.573) + 8.9 + (-4.59), and show work. The directions on the page read: Add the three numbers and show your work. Write each sum on the answer line. An answer key is included.

Yes, both. We made it for 7th grade rational numbers, and it works the same at home or at school. At home, a student can work through it alone and then go over it with you, which shows quickly what is solid and what needs another look. In class it works as independent practice, homework or a warm-up, and you can print one copy or a full set.

Line up the decimal points, add the digits and keep the sign if both numbers share one. If the signs differ, subtract the smaller absolute value from the greater and keep the sign of the greater. Add Signed Decimals to Tenths practices this.

Rewrite the subtraction as adding the opposite, then use the addition rules. Subtract Signed Decimals Using Opposites has students rewrite each problem on a long line first.

Digits only add correctly when they have the same place value. Add Signed Decimals to Hundredths uses vertical form, and Add Three Signed Decimals has numbers with different numbers of decimal places.

Find each difference first, then compare the two values. Choose the Greater Difference of Signed Decimals has students find both differences in a row and circle the greater one.