Step-by-step explanation:
1.
[tex] \frac{8}{4} = 2[/tex]
2.
[tex] \frac{ - 10 + 3}{12} = \frac{ - 7}{12} [/tex]
3.
[tex] \frac{9}{2} + \frac{7}{2} = \frac{16}{2} = 8[/tex]
4.
[tex] \frac{54 + 56}{24} = \frac{110}{24} or \: 4 \frac{7}{12} [/tex]
5.
[tex] \frac{8 + 6 + 21}{12} = \frac{35}{12} [/tex]
6.
[tex] \frac{9 - 5}{7} = \frac{2}{7} [/tex]
7.
[tex] \frac{ - 8 - 16}{13 } = \frac{ - 24}{13} or \: 1 \frac{11}{13} \\[/tex]
8.
[tex] \frac{39 - 9}{4} = \frac{30}{4} = \frac{15}{2} or \: 7 \frac{1}{2} [/tex]
9.
[tex] \frac{27 - 28}{24} = \frac{ - 1}{24} [/tex]
10.
[tex] \frac{8 - 6 - 21}{12} = \frac{ - 19}{12} or \: - 1 \frac{7}{12} [/tex]
B.
1.
[tex] \frac{3 \times 1}{4 \times 4} = \frac{3}{16} [/tex]
2.
[tex] \frac{ - 15 \times 2}{10 \times 3} = \frac{ - 30}{30} = - 1[/tex]
3.
[tex] \frac{1 \times 3}{1 \times 6} = \frac{1}{2} [/tex]
4.
[tex] \frac{9 \times 2}{5} = \frac{18}{5} \: or \: 3 \frac{1}{5} [/tex]
5.
[tex] \frac{2 \times 3 \times 7}{ 3 \times 6 \times 4} = \frac{42}{72} or \: \frac{7}{12} [/tex]
6.
[tex] \frac{ - 1 \times 2}{4 \times 1} = \frac{ - 2}{4} = \frac{ - 1}{2} [/tex]
7.
[tex] \frac{35}{24} \times \frac{ 3}{ - 7} = \frac{5}{8} \times - 1 = \frac{5}{8} [/tex]
8.
[tex] \frac{ - 3}{4} \times \frac{1}{21} = \frac{ - 1}{4} \times \frac{1}{7} = \frac{1}{28} [/tex]
9.
[tex] \frac{10}{3} \times \frac{9}{12} = \frac{5}{1} \times \frac{3}{6} = \frac{15}{6} = \frac{5}{2} or \: 2 \frac{1}{2} [/tex]
10.
[tex]48 \times \frac{6}{3} = 16 \times \frac{6}{1} = 96[/tex]
