【小学3年算数】分数のたし算、ひき算｜練習問題

(1)\(\displaystyle \frac{5}{7}+\frac{1}{7}\)

(2)\(\displaystyle \frac{3}{6}+\frac{2}{6}\)

(3)\(\displaystyle \frac{3}{9}+\frac{4}{9}\)

(4)\(\displaystyle \frac{2}{7}+\frac{3}{7}\)

(5)\(\displaystyle \frac{4}{12}+\frac{6}{12}\)

(6)\(\displaystyle \frac{1}{20}+\frac{1}{20}\)

(7)\(\displaystyle \frac{2}{4}+\frac{1}{4}\)

(8)\(\displaystyle \frac{12}{31}+\frac{6}{31}\)

(9)\(\displaystyle \frac{7}{10}+\frac{1}{10}\)

(10)\(\displaystyle \frac{3}{11}+\frac{4}{11}\)

(11)\(\displaystyle \frac{7}{15}+\frac{6}{15}\)

(12)\(\displaystyle \frac{2}{5}+\frac{1}{5}\)

(13)\(\displaystyle \frac{1}{7}+\frac{5}{7}\)

(14)\(\displaystyle \frac{4}{13}+\frac{5}{13}\)

(15)\(\displaystyle \frac{1}{3}+\frac{1}{3}\)

(16)\(\displaystyle \frac{5}{23}+\frac{2}{23}\)

(17)\(\displaystyle \frac{3}{10}+\frac{6}{10}\)

(18)\(\displaystyle \frac{4}{17}+\frac{7}{17}\)

(19)\(\displaystyle \frac{25}{53}+\frac{4}{53}\)

(20)\(\displaystyle \frac{21}{32}+\frac{3}{32}\)

(21)\(\displaystyle \frac{6}{27}+\frac{15}{27}\)

(22)\(\displaystyle \frac{24}{56}+\frac{2}{56}\)

(23)\(\displaystyle \frac{2}{8}+\frac{5}{8}\)

(24)\(\displaystyle \frac{1}{5}+\frac{2}{5}\)

(25)\(\displaystyle \frac{1}{9}+\frac{7}{9}\)

(26)\(\displaystyle \frac{1}{4}+\frac{1}{4}\)

(27)\(\displaystyle \frac{5}{25}+\frac{5}{25}\)

(28)\(\displaystyle \frac{5}{23}+\frac{6}{23}\)

(29)\(\displaystyle \frac{5}{72}+\frac{23}{72}\)

(30)\(\displaystyle \frac{21}{35}+\frac{6}{35}\)

(31)\(\displaystyle \frac{29}{42}+\frac{12}{42}\)

(32)\(\displaystyle \frac{2}{17}+\frac{4}{17}\)

(33)\(\displaystyle \frac{4}{41}+\frac{2}{41}\)

(34)\(\displaystyle \frac{4}{9}+\frac{1}{9}\)

(35)\(\displaystyle \frac{3}{7}+\frac{2}{7}\)

(36)\(\displaystyle \frac{4}{6}+\frac{1}{6}\)

(37)\(\displaystyle \frac{3}{13}+\frac{6}{13}\)

(38)\(\displaystyle \frac{23}{45}+\frac{5}{45}\)

(39)\(\displaystyle \frac{12}{27}+\frac{13}{27}\)

(40)\(\displaystyle \frac{18}{34}+\frac{12}{34}\)

(41)\(\displaystyle \frac{12}{53}+\frac{23}{53}\)

(42)\(\displaystyle \frac{4}{20}+\frac{7}{20}\)

(43)\(\displaystyle \frac{3}{42}+\frac{4}{42}\)

(44)\(\displaystyle \frac{4}{15}+\frac{8}{15}\)

(45)\(\displaystyle \frac{3}{8}+\frac{2}{8}\)

(46)\(\displaystyle \frac{2}{7}+\frac{2}{7}\)

(47)\(\displaystyle \frac{3}{5}+\frac{1}{5}\)

(48)\(\displaystyle \frac{5}{9}+\frac{3}{9}\)

(49)\(\displaystyle \frac{5}{21}+\frac{2}{21}\)

(50)\(\displaystyle \frac{13}{39}+\frac{12}{39}\)

(51)\(\displaystyle \frac{2}{3}-\frac{1}{3}\)

(52)\(\displaystyle \frac{8}{9}-\frac{4}{9}\)

(53)\(\displaystyle \frac{6}{8}-\frac{3}{8}\)

(54)\(\displaystyle \frac{4}{5}-\frac{3}{5}\)

(55)\(\displaystyle \frac{10}{14}-\frac{5}{14}\)

(56)\(\displaystyle \frac{7}{8}-\frac{5}{8}\)

(57)\(\displaystyle \frac{3}{5}-\frac{2}{5}\)

(58)\(\displaystyle \frac{12}{23}-\frac{2}{23}\)

(59)\(\displaystyle \frac{10}{14}-\frac{7}{14}\)

(60)\(\displaystyle \frac{8}{9}-\frac{2}{9}\)

(61)\(\displaystyle \frac{15}{18}-\frac{10}{18}\)

(62)\(\displaystyle \frac{5}{6}-\frac{3}{6}\)

(63)\(\displaystyle \frac{22}{24}-\frac{13}{24}\)

(64)\(\displaystyle \frac{35}{52}-\frac{23}{52}\)

(65)\(\displaystyle \frac{15}{17}-\frac{3}{17}\)

(66)\(\displaystyle \frac{25}{37}-\frac{4}{37}\)

(67)\(\displaystyle \frac{7}{9}-\frac{5}{9}\)

(68)\(\displaystyle \frac{9}{10}-\frac{3}{10}\)

(69)\(\displaystyle \frac{21}{26}-\frac{5}{26}\)

(70)\(\displaystyle \frac{13}{15}-\frac{6}{15}\)

(71)\(\displaystyle \frac{27}{39}-\frac{4}{39}\)

(72)\(\displaystyle \frac{37}{42}-\frac{28}{42}\)

(73)\(\displaystyle \frac{2}{5}-\frac{1}{5}\)

(74)\(\displaystyle \frac{5}{8}-\frac{4}{8}\)

(75)\(\displaystyle \frac{8}{9}-\frac{3}{9}\)

(76)\(\displaystyle \frac{28}{32}-\frac{7}{32}\)

(77)\(\displaystyle \frac{56}{73}-\frac{52}{73}\)

(78)\(\displaystyle \frac{6}{8}-\frac{2}{8}\)

(79)\(\displaystyle \frac{23}{33}-\frac{13}{33}\)

(80)\(\displaystyle \frac{39}{64}-\frac{26}{64}\)

(81)\(\displaystyle \frac{21}{26}-\frac{6}{26}\)

(82)\(\displaystyle \frac{38}{69}-\frac{16}{69}\)

(83)\(\displaystyle \frac{26}{48}-\frac{10}{48}\)

(84)\(\displaystyle \frac{5}{6}-\frac{1}{6}\)

(85)\(\displaystyle \frac{6}{7}-\frac{4}{7}\)

(86)\(\displaystyle \frac{7}{10}-\frac{2}{10}\)

(87)\(\displaystyle \frac{10}{12}-\frac{3}{12}\)

(88)\(\displaystyle \frac{15}{21}-\frac{5}{21}\)

(89)\(\displaystyle \frac{39}{42}-\frac{23}{42}\)

(90)\(\displaystyle \frac{21}{27}-\frac{19}{27}\)

(91)\(\displaystyle \frac{32}{39}-\frac{28}{39}\)

(92)\(\displaystyle \frac{26}{37}-\frac{12}{37}\)

(93)\(\displaystyle \frac{28}{63}-\frac{21}{63}\)

(94)\(\displaystyle \frac{72}{83}-\frac{38}{83}\)

(95)\(\displaystyle \frac{4}{8}-\frac{1}{8}\)

(96)\(\displaystyle \frac{9}{12}-\frac{4}{12}\)

(97)\(\displaystyle \frac{29}{34}-\frac{14}{34}\)

(98)\(\displaystyle \frac{41}{42}-\frac{28}{42}\)

(99)\(\displaystyle \frac{19}{28}-\frac{12}{28}\)

(100)\(\displaystyle \frac{52}{84}-\frac{39}{84}\)

(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。

(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。

(3)A君は\(\displaystyle \frac{2}{5}\)m、B君は\(\displaystyle \frac{1}{5}\)mのロープを持っています。合わせて何mか答えなさい。

(4)A君は\(\displaystyle \frac{2}{5}\)m、B君は\(\displaystyle \frac{1}{5}\)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。