2 + 1 =
4 + 5 =
6 + 7 =
What do you think?
Tell whether the sum is positive, negative, or zero. Explain
n is positive and m is negative. n + (-m) is ?
1 answer
n is positive and m is negative. n + (-m) is ?
1 answer
3 answers
1 answer
1 answer
1 answer