Grade 8 Expressions & Equations Missing Number
Grade 8 expressions and equations missing number sheet: 24 problems on multi-step linear equations, two-step equations.
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Three different problem sets — same skill, same layout, fresh numbers.
Preview — Set A
Find the number that belongs in each blank.
- 1.Solve: 5x + 3 = -27
- 2.Solve: -1x + 3 = 8
- 3.Solve: 6x + 8 = 2
- 4.Solve: -4x + (-17) = 7
- 5.Solve: 8x + 1 = 9
- 6.Solve: -3x + (-1) = 29
- 7.Solve: 4x + (-6) = 26
- 8.Solve: 2x + (-7) = 11
- 9.Solve: 4x + 17 = -11
- 10.Solve: 2x + 8 = 10
- 11.Solve: 1x + (-14) = -4
- 12.Solve: 3x + 18 = 30
- 13.Solve: -7x + (-10) = -17
- 14.Solve: 2x + 7 = 23
- 15.Solve: -6x + (-12) = -48
- 16.Solve: -9x + (-3) = -30
- 17.Solve: 6x + (-18) = 42
- 18.Solve: 6x + (-2) = 52
- 19.Solve: -7x + 7 = 21
- 20.Solve: 4x + (-17) = 11
- 21.Solve: -6x + (-17) = -23
- 22.Solve: 1x + (-19) = -11
- 23.Solve: -3x + 20 = 17
- 24.Solve: 1x + (-11) = -4
What this worksheet covers
24 expressions and equations problems fill this missing number page; problem 9 asks "Solve: 4x + 17 = -11", and the sheet stays at that level throughout. What makes this set particular: nineteen of the 24 problems involve a negative quantity and the numbers run as high as 52. Further down, problem 17 asks "Solve: 6x + (-18) = 42". It is written against Common Core 8.EE.7 — Expressions & Equations, grade 8.
Skills practiced
The grade 8 expressions and equations sequence covers multi-step linear equations, operations in scientific notation and integer exponent rules; this page sits inside it. What a student is asked to do here is multi-step linear equations and two-step equations. To finish it, a student has to track direction as well as magnitude. Fourteen different answers appear across the 24 problems, so a student cannot copy one result down the page.
About the missing number format
The 24 problems here move the unknown around, so a student solves for a missing part as often as for a result; problem 9, "Solve: 4x + 17 = -11" is one of them. A missing coefficient or constant asks the student to reason about the structure of the expression, which is the algebraic habit itself.
Set A, Set B and Set C
The three sets come from the same generator with three different seeds: same skill, same layout, fresh numbers, and an answer key computed with the problems. Where Set A's problem 13 is "Solve: -7x + (-10) = -17", Set B's is "Solve: 5x + (-9) = -39".
How to use this worksheet
Have the student estimate before computing, then compare. At grade 8 an expressions and equations answer that is wildly off should announce itself, and building that reflex matters as much as the 24 answers. Print Set B of this expressions and equations missing number before writing on Set A; the same skill worked twice a week apart tells you far more than once.
One mistake to watch for
In a two-step equation the coefficient is divided off before the constant is subtracted. On this grade 8 missing number, problem 9 ("Solve: 4x + 17 = -11") is the kind of item where it shows.
The order of undoing is being taken from the order of doing.
Undo in reverse: whatever was done last to x is undone first.
Other grade 8 expressions and equations formats
The same skill in the other formats available at this grade.
- Drill — Grade 8 Adding Numbers in Scientific Notation, 16 problems
- Timed Drill — 8.EE.3 — Scientific Notation Division Practice, 22 problems
- Mixed Review — Grade 8 Subtracting Numbers in Scientific Notation, 16 problems
- Word Problems — Grade 8 Word Problems: Writing and Solving Linear Equations, 14 problems
A step either side
The same format one grade down and one grade up — the easier sheet is often the faster fix when this one is not landing.
- Grade 7 Expressions & Equations Missing Number — grade 7, 24 problems
Missing Number sheets in other grade 8 topics
Six PDFs, no sign-up: three versions of this grade 8 expressions and equations missing number and three answer keys, each 24 problems long.