Ten free 8th grade word problems about coding, 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 two-step equations, proportions, percent increase and decrease, simple interest, adding and subtracting integers, and mean (average) (8th-grade equation solving plus 7th-grade review). 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 coding.
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
Coding Math
8th Grade · Two-step equations · Proportions · Percent increase and decrease · Simple interest · Adding and subtracting integers · Mean (average)
Name Date
Sam has 52 robot parts in all: 7 loose robot parts plus 9 kits with the same number of robot parts in each kit. If x is the number of robot parts in each kit, solve 9x+7=52.
A.x=5
B.x=6.56
C.x=5.78
D.x=45
Sam uses red pixels and blue pixels in a ratio of 4:6 in a pixel-art logo. How many red pixels go with 9 blue pixels?
Answer:
Last month, Sam had 80 lines of code in a game project. Now Sam has 120. What is the percent increase?
A. 50%
B. 33.33%
C. 40%
D. 25%
Sam's coding club raised $700 at a game night and put it in a savings account that pays 1% simple interest per year. How much interest will it earn in 3 years?
Answer:
Sam keeps track of how much the score changes in a game being tested: +7 points in the first test run and +1 point in the second test run. What is the total change?
Answer:
Over five projects, Sam wrote this many functions: 2, 6, 14, 13, 5. Find the mean (the average) number of functions per project.
Answer:
Sam has 60 robot parts in all: 5 loose robot parts plus 5 kits with the same number of robot parts in each kit. If x is the number of robot parts in each kit, solve 5x+5=60.
A.x=13
B.x=12
C.x=11
D.x=55
Sam places enemy sprites and coin sprites in a ratio of 4:3 in a game level. How many enemy sprites go with 15 coin sprites?
Answer:
Last week, 120 players tried the coding club's new game. This week, Sam counted 150. What is the percent increase?
A. 20%
B. 30%
C. 25%
D. 12.5%
Sam's coding club raised $700 at a game night and put it in a savings account that pays 2% simple interest per year. How much interest will it earn in 6 years?
Answer:
The key always prints on its own page.
Answer key
Coding Math · 8th Grade
A. x=5Undothe+7first(subtractfrombothsides),thenundothe×9(dividebothsides):x=5.
6Cross-multiply:4×9=36,thendivideby6:x=6.
A. 50%Percentchange=(change÷original)×100=(40÷80)×100=50%.
21.00700×0.01×3=$21.00.
87+1=8.
82+6+14+13+5=40,and40÷5=8.
C. x=11Undothe+5first(subtractfrombothsides),thenundothe×5(dividebothsides):x=11.
20Cross-multiply:4×15=60,thendivideby3:x=20.
C. 25%Percentchange=(change÷original)×100=(30÷120)×100=25%.
84.00700×0.02×6=$84.00.
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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 8th grade sheet cover?
Two-step equations, Proportions, Percent increase and decrease, Simple interest, Adding and subtracting integers, and Mean (average), a mix of 8th-grade equation solving and 7th-grade review. 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 coding lesson for 8th grade with no sign-up.