Sign of the
Answer
Adding
Easier
Adding
Harder
Subtracting
Easier
Subtracting
Harder
100

18 + (-9)

Will the answer be positive or negative?

Positive

100
-3 + (-12)
What is -15?
100
-54 + (-48)
What is -102?
100
6 - (-5)
What is 11?
100
8 - 12
What is -4?
200

-300 + (-100)

Will the answer be positive or negative?

Negative

200
7 + (-4)
What is 3?
200
120 + (-78)
What is 42?
200
-10 - (-10)
What is 0?
200
-21 - 19
What is -40?
300

25 + (-75)

Will the answer be positive or negative?

Negative

300
-21 + 17
What is -4?
300
-500 + 150
What is -350?
300
-20 - 7
What is -27?
300
19 - (-16)
What is 35?
400

15 - (-20)

Will the answer be positive or negative?

Positive

400
-34 + (-34)
What is -68?
400
-425 + (-240)
What is -665?
400
-35 - 10
What is -45?
400
-50 - (-49)
What is -1?
M
e
n
u