Is that a trick question wouldn't it be 20??? I'm confused
Answer:
20(5+1) is equivalent to 100 + 20
I think this is more of an opinion question. What someone could solve mentally may not be the same as someone else's.If it were my worksheet, I'd circle all of them but it may be different for you.
At your level, I'd probably circle:
54 - 10
93 - 20
and 39 - 2
the answer would be -1,224 because the parentheses is your multiplication and the it is a negative
