1.次の計算をしなさい。
(1)\(\displaystyle \frac{5}{7}+\frac{1}{7}\)
\(\displaystyle \frac{6}{7}\)
(2)\(\displaystyle \frac{3}{6}+\frac{2}{6}\)
\(\displaystyle \frac{5}{6}\)
(3)\(\displaystyle \frac{3}{9}+\frac{4}{9}\)
\(\displaystyle \frac{7}{9}\)
(4)\(\displaystyle \frac{2}{7}+\frac{3}{7}\)
\(\displaystyle \frac{5}{7}\)
(5)\(\displaystyle \frac{4}{12}+\frac{6}{12}\)
\(\displaystyle \frac{10}{12}\)
(6)\(\displaystyle \frac{1}{20}+\frac{1}{20}\)
\(\displaystyle \frac{2}{20}\)
(7)\(\displaystyle \frac{2}{4}+\frac{1}{4}\)
\(\displaystyle \frac{3}{4}\)
(8)\(\displaystyle \frac{12}{31}+\frac{6}{31}\)
\(\displaystyle \frac{18}{31}\)
(9)\(\displaystyle \frac{7}{10}+\frac{1}{10}\)
\(\displaystyle \frac{8}{10}\)
(10)\(\displaystyle \frac{3}{11}+\frac{4}{11}\)
\(\displaystyle \frac{7}{11}\)
(11)\(\displaystyle \frac{7}{15}+\frac{6}{15}\)
\(\displaystyle \frac{13}{15}\)
(12)\(\displaystyle \frac{2}{5}+\frac{1}{5}\)
\(\displaystyle \frac{3}{5}\)
(13)\(\displaystyle \frac{2}{7}+\frac{3}{7}\)
\(\displaystyle \frac{5}{7}\)
(14)\(\displaystyle \frac{4}{13}+\frac{5}{13}\)
\(\displaystyle \frac{9}{13}\)
(15)\(\displaystyle \frac{1}{3}+\frac{1}{3}\)
\(\displaystyle \frac{2}{3}\)
(16)\(\displaystyle \frac{5}{23}+\frac{2}{23}\)
\(\displaystyle \frac{7}{23}\)
(17)\(\displaystyle \frac{3}{10}+\frac{6}{10}\)
\(\displaystyle \frac{9}{10}\)
(18)\(\displaystyle \frac{4}{17}+\frac{7}{17}\)
\(\displaystyle \frac{11}{17}\)
(19)\(\displaystyle \frac{25}{53}+\frac{4}{53}\)
\(\displaystyle \frac{29}{53}\)
(20)\(\displaystyle \frac{21}{32}+\frac{3}{32}\)
\(\displaystyle \frac{24}{32}\)
(21)\(\displaystyle \frac{6}{27}+\frac{15}{27}\)
\(\displaystyle \frac{21}{27}\)
(22)\(\displaystyle \frac{24}{56}+\frac{2}{56}\)
\(\displaystyle \frac{26}{56}\)
(23)\(\displaystyle \frac{2}{8}+\frac{5}{8}\)
\(\displaystyle \frac{7}{8}\)
(24)\(\displaystyle \frac{1}{5}+\frac{2}{5}\)
\(\displaystyle \frac{3}{5}\)
(25)\(\displaystyle \frac{1}{9}+\frac{7}{9}\)
\(\displaystyle \frac{8}{9}\)
(26)\(\displaystyle \frac{2}{4}+\frac{1}{4}\)
\(\displaystyle \frac{3}{4}\)
(27)\(\displaystyle \frac{5}{25}+\frac{5}{25}\)
\(\displaystyle \frac{10}{25}\)
(28)\(\displaystyle \frac{5}{23}+\frac{6}{23}\)
\(\displaystyle \frac{11}{23}\)
(29)\(\displaystyle \frac{5}{72}+\frac{23}{72}\)
\(\displaystyle \frac{28}{72}\)
(30)\(\displaystyle \frac{21}{35}+\frac{6}{35}\)
\(\displaystyle \frac{27}{35}\)
(31)\(\displaystyle \frac{29}{42}+\frac{12}{42}\)
\(\displaystyle \frac{41}{42}\)
(32)\(\displaystyle \frac{2}{17}+\frac{4}{17}\)
\(\displaystyle \frac{6}{17}\)
(33)\(\displaystyle \frac{4}{41}+\frac{2}{41}\)
\(\displaystyle \frac{6}{41}\)
(34)\(\displaystyle \frac{4}{9}+\frac{1}{9}\)
\(\displaystyle \frac{5}{9}\)
(35)\(\displaystyle \frac{3}{7}+\frac{2}{7}\)
\(\displaystyle \frac{5}{7}\)
(36)\(\displaystyle \frac{4}{6}+\frac{1}{6}\)
\(\displaystyle \frac{5}{6}\)
(37)\(\displaystyle \frac{3}{13}+\frac{6}{13}\)
\(\displaystyle \frac{9}{13}\)
(38)\(\displaystyle \frac{23}{45}+\frac{5}{45}\)
\(\displaystyle \frac{28}{45}\)
(39)\(\displaystyle \frac{12}{27}+\frac{13}{27}\)
\(\displaystyle \frac{25}{27}\)
(40)\(\displaystyle \frac{18}{34}+\frac{12}{34}\)
\(\displaystyle \frac{30}{34}\)
(41)\(\displaystyle \frac{12}{53}+\frac{23}{53}\)
\(\displaystyle \frac{35}{53}\)
(42)\(\displaystyle \frac{4}{20}+\frac{7}{20}\)
\(\displaystyle \frac{11}{20}\)
(43)\(\displaystyle \frac{3}{42}+\frac{4}{42}\)
\(\displaystyle \frac{7}{42}\)
(44)\(\displaystyle \frac{7}{15}+\frac{6}{15}\)
\(\displaystyle \frac{13}{15}\)
(45)\(\displaystyle \frac{1}{4}+\frac{1}{4}\)
\(\displaystyle \frac{2}{4}\)
(46)\(\displaystyle \frac{2}{7}+\frac{2}{7}\)
\(\displaystyle \frac{4}{7}\)
(47)\(\displaystyle \frac{2}{5}+\frac{1}{5}\)
\(\displaystyle \frac{3}{5}\)
(48)\(\displaystyle \frac{5}{9}+\frac{3}{9}\)
\(\displaystyle \frac{8}{9}\)
(49)\(\displaystyle \frac{5}{21}+\frac{2}{21}\)
\(\displaystyle \frac{7}{21}\)
(50)\(\displaystyle \frac{13}{39}+\frac{12}{39}\)
\(\displaystyle \frac{25}{39}\)
(51)\(\displaystyle \frac{2}{3}-\frac{1}{3}\)
\(\displaystyle \frac{1}{3}\)
(52)\(\displaystyle \frac{8}{9}-\frac{4}{9}\)
\(\displaystyle \frac{4}{9}\)
(53)\(\displaystyle \frac{6}{8}-\frac{3}{8}\)
\(\displaystyle \frac{3}{8}\)
(54)\(\displaystyle \frac{4}{5}-\frac{3}{5}\)
\(\displaystyle \frac{1}{5}\)
(55)\(\displaystyle \frac{10}{14}-\frac{5}{14}\)
\(\displaystyle \frac{5}{14}\)
(56)\(\displaystyle \frac{7}{8}-\frac{5}{8}\)
\(\displaystyle \frac{2}{8}\)
(57)\(\displaystyle \frac{3}{5}-\frac{2}{5}\)
\(\displaystyle \frac{1}{5}\)
(58)\(\displaystyle \frac{12}{23}-\frac{2}{23}\)
\(\displaystyle \frac{10}{23}\)
(59)\(\displaystyle \frac{10}{14}-\frac{7}{14}\)
\(\displaystyle \frac{3}{14}\)
(60)\(\displaystyle \frac{8}{9}-\frac{2}{9}\)
\(\displaystyle \frac{6}{9}\)
(61)\(\displaystyle \frac{15}{18}-\frac{10}{18}\)
\(\displaystyle \frac{5}{18}\)
(62)\(\displaystyle \frac{5}{6}-\frac{3}{6}\)
\(\displaystyle \frac{2}{6}\)
(63)\(\displaystyle \frac{22}{24}-\frac{13}{24}\)
\(\displaystyle \frac{9}{24}\)
(64)\(\displaystyle \frac{35}{52}-\frac{23}{52}\)
\(\displaystyle \frac{12}{52}\)
(65)\(\displaystyle \frac{15}{17}-\frac{3}{17}\)
\(\displaystyle \frac{12}{17}\)
(66)\(\displaystyle \frac{25}{37}-\frac{4}{37}\)
\(\displaystyle \frac{21}{37}\)
(67)\(\displaystyle \frac{7}{9}-\frac{5}{9}\)
\(\displaystyle \frac{2}{9}\)
(68)\(\displaystyle \frac{9}{10}-\frac{3}{10}\)
\(\displaystyle \frac{6}{10}\)
(69)\(\displaystyle \frac{21}{26}-\frac{5}{26}\)
\(\displaystyle \frac{16}{26}\)
(70)\(\displaystyle \frac{13}{15}-\frac{6}{15}\)
\(\displaystyle \frac{7}{15}\)
(71)\(\displaystyle \frac{27}{39}-\frac{4}{39}\)
\(\displaystyle \frac{23}{39}\)
(72)\(\displaystyle \frac{37}{42}-\frac{28}{42}\)
\(\displaystyle \frac{9}{42}\)
(73)\(\displaystyle \frac{2}{5}-\frac{1}{5}\)
\(\displaystyle \frac{1}{5}\)
(74)\(\displaystyle \frac{5}{8}-\frac{4}{8}\)
\(\displaystyle \frac{1}{8}\)
(75)\(\displaystyle \frac{8}{9}-\frac{3}{9}\)
\(\displaystyle \frac{5}{9}\)
(76)\(\displaystyle \frac{28}{32}-\frac{7}{32}\)
\(\displaystyle \frac{21}{32}\)
(77)\(\displaystyle \frac{56}{73}-\frac{52}{73}\)
\(\displaystyle \frac{4}{73}\)
(78)\(\displaystyle \frac{6}{8}-\frac{2}{8}\)
\(\displaystyle \frac{4}{8}\)
(79)\(\displaystyle \frac{23}{33}-\frac{13}{33}\)
\(\displaystyle \frac{10}{33}\)
(80)\(\displaystyle \frac{39}{64}-\frac{26}{64}\)
\(\displaystyle \frac{13}{64}\)
(81)\(\displaystyle \frac{21}{26}-\frac{6}{26}\)
\(\displaystyle \frac{15}{26}\)
(82)\(\displaystyle \frac{38}{69}-\frac{16}{69}\)
\(\displaystyle \frac{22}{69}\)
(83)\(\displaystyle \frac{26}{48}-\frac{10}{48}\)
\(\displaystyle \frac{16}{48}\)
(84)\(\displaystyle \frac{5}{6}-\frac{1}{6}\)
\(\displaystyle \frac{4}{6}\)
(85)\(\displaystyle \frac{6}{7}-\frac{4}{7}\)
\(\displaystyle \frac{2}{7}\)
(86)\(\displaystyle \frac{4}{5}-\frac{3}{5}\)
\(\displaystyle \frac{1}{5}\)
(87)\(\displaystyle \frac{10}{12}-\frac{3}{12}\)
\(\displaystyle \frac{7}{12}\)
(88)\(\displaystyle \frac{15}{21}-\frac{5}{21}\)
\(\displaystyle \frac{10}{21}\)
(89)\(\displaystyle \frac{39}{42}-\frac{23}{42}\)
\(\displaystyle \frac{16}{42}\)
(90)\(\displaystyle \frac{21}{27}-\frac{19}{27}\)
\(\displaystyle \frac{2}{27}\)
(91)\(\displaystyle \frac{32}{39}-\frac{28}{39}\)
\(\displaystyle \frac{4}{39}\)
(92)\(\displaystyle \frac{26}{37}-\frac{12}{37}\)
\(\displaystyle \frac{14}{37}\)
(93)\(\displaystyle \frac{28}{63}-\frac{21}{63}\)
\(\displaystyle \frac{7}{63}\)
(94)\(\displaystyle \frac{72}{83}-\frac{38}{83}\)
\(\displaystyle \frac{34}{83}\)
(95)\(\displaystyle \frac{4}{8}-\frac{1}{8}\)
\(\displaystyle \frac{3}{8}\)
(96)\(\displaystyle \frac{9}{12}-\frac{4}{12}\)
\(\displaystyle \frac{5}{12}\)
(97)\(\displaystyle \frac{29}{34}-\frac{14}{34}\)
\(\displaystyle \frac{15}{34}\)
(98)\(\displaystyle \frac{41}{42}-\frac{28}{42}\)
\(\displaystyle \frac{13}{42}\)
(99)\(\displaystyle \frac{19}{28}-\frac{12}{28}\)
\(\displaystyle \frac{7}{28}\)
(100)\(\displaystyle \frac{52}{84}-\frac{39}{84}\)
\(\displaystyle \frac{13}{84}\)
2.次の問いに答えなさい。
(1)牛乳が\(\displaystyle \frac{3}{5}\)ℓ、\(\displaystyle \frac{1}{5}\)ℓあります。合わせて何ℓか答えなさい。
\(\displaystyle \frac{3}{5}+\frac{1}{5}=\frac{4}{5}\)
【答】\(\displaystyle \frac{4}{5}\)ℓ
(2)牛乳\(\displaystyle \frac{4}{5}\)ℓのうち、\(\displaystyle \frac{1}{5}\)ℓ飲みました。残り何ℓか答えなさい。
\(\displaystyle \frac{4}{5}-\frac{1}{5}=\frac{3}{5}\)
【答】\(\displaystyle \frac{3}{5}\)ℓ
(3)A君は\(\displaystyle \frac{2}{5}\)m、B君はは\(\displaystyle \frac{1}{5}\)mのロープを持っています。合わせて何mか答えなさい。
\(\displaystyle \frac{2}{5}+\frac{1}{5}=\frac{3}{5}\)
【答】\(\displaystyle \frac{3}{5}\)m
(4)A君は\(\displaystyle \frac{2}{5}\)m、B君はは\(\displaystyle \frac{1}{5}\)mのロープを持っています。長さの違いが何mか答えなさい。
\(\displaystyle \frac{2}{5}-\frac{1}{5}=\frac{1}{5}\)
【答】\(\displaystyle \frac{1}{5}\)m