Surds

Hong Kong

Stage 1 - Stage 3

Is the result of the sum a rational or an irrational number?

$\frac{3}{10}+\frac{7}{8}$310+78

Rational

A

Irrational

B

Easy

Less than a minute

Is the result of the sum a rational or an irrational number?

$-\frac{2}{7}+\frac{1}{11}$−27+111

Is the result of the sum a rational or an irrational number?

$\frac{3}{11}+\sqrt{7}$311+√7

Is the result of the sum a rational or an irrational number?

$\frac{4}{7}$47 $+$+ $\left(-\frac{9}{11}\right)$(−911)

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