Ten free 7th grade word problems about space, with an answer key. Type your kid's first name and every problem is about them; press "New problems" for a fresh sheet as often as you like.
This sheet mixes proportions, percent increase and decrease, sale prices, simple interest, adding and subtracting integers, and two-step equations. Each problem is built from a checked math template, so the numbers change every time but the answers are always right; only the story is about space.
Print it, or let your kid work it on screen and check each answer as they go. No sign-up, and the name you type stays on your device.
✦ Mathbloom · free worksheet
Space Math
7th Grade · Proportions · Percent increase and decrease · Sale prices · Simple interest · Adding and subtracting integers · Two-step equations
Name Date
Sam uses red LEDs and white LEDs in a ratio of 9:3 on a model space station. How many red LEDs go with 40 white LEDs?
Answer:
Last month, Sam had 80 photos of the Moon. Now Sam has 120. What is the percent increase?
A. 50%
B. 33.33%
C. 40%
D. 25%
Sam wants a model rocket kit that costs $40. It goes on sale for 20% off. What is the sale price?
Answer:
Sam put $900 of birthday and allowance savings into a savings account that pays 5% simple interest per year. How much interest will the money earn in 1 year?
Answer:
Sam checked the temperature at the observatory. It was 10°C at sunrise. By noon, it had risen 11 degrees. What was the temperature at noon, in °C?
Answer:
Sam has 44 glow-in-the-dark stars in all: 8 loose glow-in-the-dark stars plus 3 bags with the same number of glow-in-the-dark stars in each bag. If x is the number of glow-in-the-dark stars in each bag, solve 3x+8=44.
A.x=17.33
B.x=14.67
C.x=36
D.x=12
Sam uses star stickers and planet stickers in a ratio of 4:6 on a bedroom ceiling map. How many star stickers go with 15 planet stickers?
Answer:
Last month, Sam had 120 space stickers. Now Sam has 180. What is the percent increase?
A. 50%
B. 33.33%
C. 60%
D. 25%
Sam wants a telescope that costs $100. It goes on sale for 25% off. What is the sale price?
Answer:
Sam's astronomy club raised $600 at a bake sale and put it in a savings account that pays 2% simple interest per year. How much interest will it earn in 3 years?
Answer:
The key always prints on its own page.
Answer key
Space Math · 7th Grade
120Cross-multiply:9×40=360,thendivideby3:x=120.
A. 50%Percentchange=(change÷original)×100=(40÷80)×100=50%.
32.0020%of40is8,sothesalepriceis40−8=$32.00.
45.00900×0.05×1=$45.00.
2110+11=21.
D. x=12Undothe+8first(subtractfrombothsides),thenundothe×3(dividebothsides):x=12.
10Cross-multiply:4×15=60,thendivideby6:x=10.
A. 50%Percentchange=(change÷original)×100=(60÷120)×100=50%.
75.0025%of100is25,sothesalepriceis100−25=$75.00.
36.00600×0.02×3=$36.00.
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Questions parents ask
Are these worksheets really free?
Yes. Make, print, and play as many sheets as you like, no account and no card.
Is there an answer key?
Yes. It prints on its own page after the problems, and each answer comes with a short explanation.
Can I put my kid's name in the problems?
Yes. Type a first name and every problem uses it. The name is only used on this page in your browser; it is not sent anywhere or saved.
What does the 7th grade sheet cover?
Proportions, Percent increase and decrease, Sale prices, Simple interest, Adding and subtracting integers, and Two-step equations. You can also pick a single topic for a focused sheet.
Can my kid do it on screen instead of paper?
Yes. "Play on screen" lets them answer each problem and see right away whether it is right, with a hint when it is not.
Is there more than worksheets?
Mathbloom builds whole interactive courses around what a kid loves. You can try a free space lesson for 7th grade with no sign-up.