L'énoncé
Cet exercice est un QCM. Cochez la ou les bonne(s) réponse(s).
Tu as obtenu le score de
Question 1
\(\sqrt {0.49\times36 }=\)
\(4.2\)
\(0.7\times 6\)
\(0.49\times 36\)
\(17.64\)
Question 2
\(\sqrt{625}\times \sqrt {8100}\times 2 = \)
\(25\times 90\times 2\)
\(\sqrt{625\times 8100\times 2}\)
\(4500\)
\(225\sqrt2\)
Question 3
\(\sqrt{\dfrac{1}{121}}=\)
\( \sqrt{\dfrac{1}{11}}\)
\( \sqrt{\dfrac{1}{5.5}}\)
\( \dfrac{1}{11}\)
\(\left(\dfrac{1}{11}\right)^2\)
Question 4
\(\large \sqrt{\frac{1}{9}}\times \large \sqrt{\frac{400}{49}} = \)
\(\large \sqrt{\frac{1}{3}}\times \large \sqrt{\frac{20}{7}}\)
\(\large{\frac{1}{3}}\times \large{\frac{20}{7}}\)
\(\large{\frac{20}{21}}\)
\(\large \sqrt{\frac{1}{9}\times \large \frac{400}{49}} \)
Question 5
\(5\sqrt7-5.5\sqrt7 + \sqrt{0.49}=\)
\(0.5\sqrt7+49\)
\(0.7-0.5\sqrt7\)
\(-0.56\sqrt7\)
\(-0.5\sqrt{49}+0.7\)