Question

Efectuați:
a)5:10 supra 7
b)4:2 supra 5
c)9:18 supra 5
d)9:5 1 supra 4
e)10:7 1 supra 2
f)14:2 1 supra 3
g)4 supra 7:3 1 supra 7
h)5 1supra 3:3 1 supra 9
i)15 supra 14:3
j)8 1 supra 10: 6
Repede-repede la ora 10:20 am nevoie de ea

Answer 1

$a) \: 5 \div \frac{10}{7} = 5 \times \frac{7}{10} = \frac{35}{10} = \frac{7}{2} \\ \\ b) \: 4 \div \frac{2}{5} = 4 \times \frac{5}{2} = \frac{20}{2} = 10 \\ \\ c) \: 9 \div \frac{18}{5} = 9 \times \frac{5}{18} = \frac{45}{18} = \frac{5}{2} \\ \\ d) \: 9 \div 5 \frac{1}{4} = 9 \times \frac{4}{21} = \frac{36}{21} = \frac{12}{7} \\ \\ e) \: 10 \div 7 \frac{1}{2} = 10 \times \frac{2}{15} = \frac{20}{15} = \frac{4}{3} \\ \\ f) \: 14 \div 2 \frac{1}{3} = 14 \times \frac{3}{7} = 2 \times 3 = 6 \\ \\ g) \: \frac{4}{7} \div 3 \frac{1}{7} = \frac{4}{7} \times \frac{7}{22} = 2 \times \frac{1}{11} = \frac{2}{11} \\ \\ h) \: 5 \frac{1}{3} \div 3 \frac{1}{9} = \frac{16}{3} \times \frac{9}{28} = 4 \times \frac{3}{7} = \frac{12}{7} \\ \\ i) \: \frac{15}{14} \div 3 = \frac{15}{14} \times \frac{1}{3} = \frac{5}{14} \\ \\ j) \: 8 \frac{1}{10 } \div 6 = \frac{81}{10} \times \frac{1}{6} = \frac{81}{60} = \frac{27}{20}$