Question

+×+=+
+×–=–
–×+=–
–×–=+
one one example for this question
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Answer 1

Answer:

1 × 1 = 1

1 ×-1=-1

-1×1=-1

-1×-1=1

hope it helps you

Answer 2

Answer:

- - = +

- + = -

+ + = +

+ - = -

Step-by-step explanation:

This is so easy.

You will understand