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1
(-30)+23=
2
4+(-26)=
3
(-4)+(-18)=
4
(-10)+(-10)=
5
19+(-26)=
6
7+(-19)=
7
13+(-28)=
8
(-25)+20=
9
(-29)+10=
10
(-21)+(-21)=
11
(-6)+15=
12
(-24)+29=
13
(-4)+22=
14
16+(-12)=
15
(-27)+5=
16
4+(-22)=
17
29+(-16)=
18
30+(-19)=
19
2+(-28)=
20
(-10)+28=
Answer key
What is in this set
The numbers in this set run from 2 to 30.
75% of them have exactly one negative.
25% of them have a negative on both sides.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 100% of the problems: the minus signs were ignored and the sizes added; two numbers with different signs move in opposite directions.
Answers are a whole number.
Drawing 240 problems from this page produced 225 different ones, 94% — so a sheet of 20 is a new sheet almost every time.
We would put this in front of a grade 6 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.