Đáp án:
Giải thích các bước giải:
Bài 1
$\color {lemon yellow } {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97} $
Bài 2
$\color {lemon yellow } {12 = 2 ^ 2 \times 3 \\ 15 = 3 \times 5 \\ 18 = 2 \times 3 ^ 2 \\ $ } 12 = 2 ^ 2 \times 3 \\ 15 = 3 \times 5 \\ 18 = 2 \times 3 ^ 2 \\ 28 = 2 ^ 2 \times 7 \\ 32 = 2 ^ 5 \\ 39 = 3 \times 13 \\ 45 = 3 ^ 2 \times 5 \\ 48 = 2 ^ 4 \times 3 \\ 52 = 2 ^ 2 \times 13 \\ 54 = 2 \times 3 ^ 3 \\ 56 = 2 ^ 3 \times 7 \\ 98 = 2 ^ 7 ^ 2 \\ 46 = 2 \times 23 \\ 85 = 5 \times 17 \\ 88 = 2 ^ 3 \times 11 \\ 75 = 3 \times 5 ^ 2 \\ 77 = 7 \times 11 \\ 82 = 2 \times 41 \\ 96 = 2 ^ 5 \times 3 \\ 94 = 2 \times 47 \\ 270 = 2 \times 3 ^ 3 \times 5 \\ 108 = 2 ^ 2 \times 3 ^ 3 \\ 256 = 2 ^ 8 \\ 115 = 5 \times 23 \\ 117 = 3 ^ 2 \times 13 \\ 303 = 3 \times 101 \\ 127 = 127 \\ 723 = 3 \times 241 \\ 102 = 3 \times 3 \times 17 \\ 153 = 3 ^ 2 \times 17 \\ 207 = 3 ^ 2 \times 23 \\ 111 = 3 \times 37 \\ 132 = 2 ^ 2 \times 3 \times 11 \\ 198 = 2 \times 3 ^ 2 \times 11 \\ 189 = 3 ^ 3 \times 7 \\ 2470 = 2 \times 5 \times 13 \times 19 \\ 4940 = 2 ^ 2 \times 5 \times 13 \times 19 \\ 1134 = 2 \times 3 ^ 4 \times 7 \\ 2727 = 3 ^ 3 \times 101 \\ 7575 = 3 \times 5 ^ 2 \times 101 \\ 2929 = 29 \times 101 \\ 3131 = 31 \times 101 \\ 1313 = 13 \times 101 \\ 4343 = 43 \times 101}$
Bài 3
$\color {lemon yellow } { \frac{30}{ - 84 } = - \frac{5}{14} \\ \frac{ - 3}{21} = - \frac{1}{7} \\ \frac{ - 9}{24} = - \frac{3}{8} \\ \frac{ - 6}{ - 9} = \frac{2}{3} \\ \frac{ - 4}{ - 6} = \frac{2}{3} \\ \frac{ - 8}{10} = - \frac{4}{5} \\ \frac{45}{26} = \frac{45}{26} \\ \frac{36}{24} = \frac{3}{2} \\ \frac{40}{55} = \frac{8}{11} \\ \frac{ - 28}{40} = - \frac{7}{10} \\ \frac{15}{ - 45} = - \frac{1}{3} \\ \frac{56}{70} = \frac{4}{5} \\ \frac{ - 18}{90} = - \frac{1}{5} \\ \frac{30}{36} = \frac{5}{6} \\ \frac{ - 32}{72} = - \frac{4}{9} \\ \frac{ - 48}{ - 54} = \frac{8}{9} \\ \frac{5}{ - 25} = - \frac{1}{5} \\ \frac{ - 35}{75} = - \frac{7}{15} \\ \frac{27}{36} = \frac{3}{4} \\ \frac{ - 50}{150} = - \frac{1}{3} \\ \frac{58}{72} = \frac{29}{36} \\ \frac{74}{38} = \frac{37}{19} \\ \frac{ - 300}{360} = - \frac{5}{6} \\ \frac{126}{450} = \frac{7}{25}} $
