If a>b and c>d , which of the following must be true?

×
ac>bd

×
a+b>c+d

✓
a+c>b+d

×
ab>cd

×
ad>bc
If a>b and c>d , which of the following must be true?
ac>bd
a+b>c+d
a+c>b+d
ab>cd
ad>bc
If a, c is less than 1, A is not true
Not true
If a>b and c>d
Add the two inequalities, we get
a+c>b+d
Not true
not true