1.次のわり算を分数で答えなさい。
(1)1÷5
\(\displaystyle \frac{1}{5}\)
(2)3÷4
\(\displaystyle \frac{3}{4}\)
(3)2÷7
\(\displaystyle \frac{2}{7}\)
(4)4÷9
\(\displaystyle \frac{4}{9}\)
(5)13÷15
\(\displaystyle \frac{13}{15}\)
(6)11÷6
\(\displaystyle \frac{11}{6}\)
(7)28÷19
\(\displaystyle \frac{28}{19}\)
(8)8÷1
\(\displaystyle \frac{8}{1}\)
(9)8÷3
\(\displaystyle \frac{8}{3}\)
(10)5÷2
\(\displaystyle \frac{5}{2}\)
(11)9÷5
\(\displaystyle \frac{9}{5}\)
(12)12÷8
\(\displaystyle \frac{3}{2}\)
(13)18÷3
\(\displaystyle \frac{6}{1}\)
(14)64÷8
\(\displaystyle \frac{8}{1}\)
(15)2÷7
\(\displaystyle \frac{2}{7}\)
(16)3÷10
\(\displaystyle \frac{3}{10}\)
(17)5÷15
\(\displaystyle \frac{1}{3}\)
(18)10÷40
\(\displaystyle \frac{1}{4}\)
2.次の分数を小数で表しなさい。
(1)\(\displaystyle \frac{5}{2}\)
2.5
(2)\(\displaystyle \frac{2}{8}\)
0.25
(3)\(\displaystyle \frac{3}{5}\)
0.6
(4)\(\displaystyle \frac{21}{25}\)
0.84
(5)\(\displaystyle \frac{21}{200}\)
0.105
(6)\(\displaystyle \frac{8}{5}\)
1.6
(7)\(\displaystyle \frac{9}{4}\)
2.25
(8)1\(\displaystyle \frac{1}{5}\)
1.2
(9)2\(\displaystyle \frac{3}{4}\)
2.75
(10)1\(\displaystyle \frac{9}{50}\)
1.18
(11)\(\displaystyle \frac{1}{2}\)
0.5
(12)\(\displaystyle \frac{4}{5}\)
0.8
(13)\(\displaystyle \frac{16}{25}\)
0.64
(14)\(\displaystyle \frac{5}{8}\)
0.625
(15)\(\displaystyle \frac{48}{24}\)
2
(16)\(\displaystyle \frac{35}{7}\)
5
(17)\(\displaystyle \frac{169}{13}\)
13
(18)\(\displaystyle \frac{9}{5}\)
1.8
(19)\(\displaystyle \frac{67}{20}\)
3.35
(20)2\(\displaystyle \frac{1}{8}\)
2.125
3.次の数を分数で表しなさい。
(1)0.6
\(\displaystyle \frac{3}{5}\)
(2)0.1
\(\displaystyle \frac{1}{10}\)
(3)0.07
\(\displaystyle \frac{7}{100}\)
(4)0.83
\(\displaystyle \frac{83}{100}\)
(5)0.95
\(\displaystyle \frac{19}{20}\)
(6)2.7
\(\displaystyle \frac{27}{10}\)
(7)3.12
\(\displaystyle \frac{78}{25}\)
(8)4
\(\displaystyle \frac{4}{1}\)
(9)67
\(\displaystyle \frac{67}{1}\)
(10)100
\(\displaystyle \frac{100}{1}\)
(11)0.3
\(\displaystyle \frac{3}{10}\)
(12)0.17
\(\displaystyle \frac{17}{100}\)
(13)0.009
\(\displaystyle \frac{9}{1000}\)
(14)1.23
\(\displaystyle \frac{123}{100}\)
(15)1.007
\(\displaystyle \frac{1007}{1000}\)
(16)0.4
\(\displaystyle \frac{2}{5}\)
(17)0.08
\(\displaystyle \frac{2}{25}\)
(18)1.25
\(\displaystyle \frac{5}{4}\)
(19)1.125
\(\displaystyle \frac{9}{8}\)
(20)2.375
\(\displaystyle \frac{19}{8}\)