–6 + 2 =

Adding negative numbers

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

Hundred and tens tables to make 430 in five different ways

Why is causation so much more difficult to prove than correlation?