Collecting like terms

Difficulty Standard · Set 8a5kbu

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1
Simplify9x+9x+2— give the number of x.
2
Simplify4x+3x+3— give the number of x.
3
Simplify2x+2x+4— give the number of x.
4
Simplify8x+3x+4— give the number of x.
5
Simplify9x+6x+10— give the number of x.
6
Simplify3x+9x+11— give the number of x.
7
Simplify8x+5x+13— give the number of x.
8
Simplify7x+7x+2— give the number of x.
9
Simplify10x+2x+8— give the number of x.
10
Simplify3x+8x+2— give the number of x.
11
Simplify3x+8x+12— give the number of x.
12
Simplify8x+2x+11— give the number of x.
13
Simplify7x+6x+7— give the number of x.
14
Simplify5x+3x+12— give the number of x.
15
Simplify10x+2x+6— give the number of x.
16
Simplify10x+8x+10— give the number of x.
17
Simplify9x+3x+13— give the number of x.
18
Simplify6x+6x+7— give the number of x.
19
Simplify10x+8x+6— give the number of x.
20
Simplify6x+4x+4— give the number of x.

What is in this set

The numbers in this set run from 2 to 13.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 100% of the problems: the 10 was collected with the x terms.
Answers are a whole number.

Drawing 240 problems from this page produced 214 different ones, 89% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 7 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.