add up
1.把...加起来
Add up 3,4 and 5 and you'll get 12.
把三、四、五相加,总数是十二.
add up to
1.总计达
The bills add up to exactly $100.
这些帐单加起来正好一百元.
2.意味着
His evidence really adds up to this:he didn't murder the man.
他的证据实际上意味着:他没有谋杀那个人.
add就是单纯的加的意思