Grade 7 · Math

7th grade Add and subtract fractions and decimals, including negatives worksheet

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Add and subtract fractions and decimals, including negatives

Grade 7 Math Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

Kira picks a four-number star card. What is 1.8 + (-0.7) + 2.2 + (-1.3)?
Milo rings a bell for a four-number question. What is (-0.6) + 1.9 + (-1.4) + 0.8?
Noah fills in a balance puzzle: (-2.6) + ? = 1.4. What is the missing number?
Pia fills in a puzzle card: 3.75 + ? = (-1.25). What is the missing number?
Tala rings a bell for a blank: 2/3 + ? = (-1/6). What is the missing number?
Ari adds numbers with three decimal places. What is (-0.482) + (-1.37)?
At dawn Jun's thermometer read -3.5°C. It rose 6.2°C by noon, then fell 4.75°C by night. What was the temperature at night?
Kira watches a whale at -2.8 m. It dives 1.35 m deeper, then swims up 3.2 m. Where is the whale now? (Below the surface is negative.)
Luz's tide gauge reads -1/2 ft at dawn. The tide rises 3/4 ft, then falls 5/6 ft. What does the gauge read now? (Below the dock mark is negative.)
Milo's bucket water is 2/3 in above the fill line. It drops 3/4 in, then drops 1/2 in more. Where is the water now? (Below the line is negative.)

7th grade Add and subtract fractions and decimals, including negatives worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

Add and subtract fractions and decimals, including negatives. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can add and subtract fractions and decimals that can be negative, by moving along a number line.
I can group numbers to make a sum easier: cancel opposites, or add the positives and the negatives separately.
I can find the distance between two fractions or decimals, and a missing number in a + ? = c.

Standard: 7.NS.A.1d (also 7.NS.A.1b–c)

Words to know

rational number: Any number that can be written as a fraction, like 3/4, -2, or 1.25.

opposite: The number the same distance from 0 on the other side, like 3/4 and -3/4.

common denominator: A bottom number both fractions can share, so the pieces are the same size.

place value: What a digit is worth: tenths, hundredths, thousandths.

distance: How far apart two numbers are on the number line. Never negative.

sum: The answer to adding.

Common mistakes

Your child added the sizes and left out the minus signs.

Your child got the right size but the wrong sign.

Your child moved the wrong way for the second number.

What to say

Ask: on a number line, which way does a negative number move you?

Ask: after the last move on the number line, are you left or right of 0?

Ask: when you add a negative number, do you move left or right?

Questions parents ask

What is the most common mistake with add and subtract fractions and decimals, including negatives?

Your child added the sizes and left out the minus signs.

How can I help my child with add and subtract fractions and decimals, including negatives?

Ask: on a number line, which way does a negative number move you?

Are these 7th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More grade 7 math

See all grade 7 math

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