Question

which is true
3+1+3 times 0
7 times 1=0+7
6 times 1 times 0= 6+1+0
1+1=1 times 1

Answer 1

Interpret multiplication before addition. Evaluating each:

1. 3 + 1 + 3 times 0 = 3 + 1 + (3·0) = 3 + 1 + 0 = 4 (not an equality as written, but the value is 4).
2. 7 times 1 = 0 + 7 → 7·1 = 7 and 0 + 7 = 7, so this is true.
3. 6 times 1 times 0 = 6 + 1 + 0 → 6·1·0 = 0 while 6 + 1 + 0 = 7, so this is false.
4. 1 + 1 = 1 times 1 → 1 + 1 = 2 while 1·1 = 1, so this is false.

Only statement 2 is true.