The expressions are irrational 1/3 + √216 and √64+ √353 and the expressions √100 × √100, 13.5 + √81, √9 + √729, and 1/5 + 2.5 are rational number.
If the value of a numerical expression is terminating then they are the rational number then they are called the rational number and if the value of a numerical expression is non-terminating then they are called an irrational number.
1.  √100 × √100
→ √100 × √100
→ 10 × 10 = 100
This is a rational number.
2.  13.5 + √81
→ 13.5 + √81
→ 13.5 + 9 = 22.5
This is a rational number.
3.  √9 + √729
→ √9 + √729
→ 3 + 27 = 30
This is a rational number.
4.  √64+ √353
→ √64 + √353
→ 8 + √353
This is an irrational number.
5.  1/3 + √216
→ 1/3 + √216
→ 1/3 + √216
This is an irrational number.
6. Â 1/5 + 2.5
→ 1/5 + 2.5
→ 0.2 + 2.5 = 2.7
This is a rational number.
More about the rational number link is given below.
https://brainly.com/question/9466779
