算数演習/小学校5年生

初等数学演習 ＞算数演習　小学校5年生

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小数のしくみ

次の計算をしましょう。

(1)

$4.5\times 10$

(2)

$0.86\times 10$

(3)

$0.071\times 10$

(4)

$3.06\times 100$

(5)

$0.094\times 100$

(6)

$90.2\div 10$

(7)

$1.75\div 10$

(8)

$0.87\div 10$

(9)

$0.3\div 100$

(10)

$590\div 100$

小数のかけ算(2)

次の計算をしましょう。

(1)

$4\times 0.2$

(2)

$30\times 0.6$

(3)

$70\times 0.7$

(4)

$400\times 0.5$

(5)

$63\times 1.3$

(6)

$39\times 8.7$

(7)

$24\times 1.5$

(8)

$45\times 7.2$

(9)

$1.4\times 5.1$

(10)

$2.7\times 6.9$

(11)

$3.8\times 0.9$

(12)

$1.8\times 0.7$

(13)

$3.4\times 4.5$

(14)

$3.5\times 3.2$

(15)

$0.6\times 8.5$

(16)

$3.5\times 0.8$

(17)

$0.9\times 0.3$

(18)

$0.2\times 4.5$

(19)

$2.5\times 1.6$

(20)

$12.5\times 0.8$

小数のわり算(2)

次の計算をしてみましょう。

(1)

$2\div 0.4$

(2)

$9\div 0.3$

(3)

$10\div 0.2$

(4)

$2.4\div 1.2$

(5)

$14.4\div 1.8$

(6)

$58.4\div 7.3$

(7)

$280\div 3.5$

(8)

$30\div 1.5$

(9)

$2.8\div 3.5$

(10)

$2.2\div 5.5$

(11)

$1.8\div 2.4$

(12)

$6.9\div 2.5$

(13)

$8\div 2.5$

(14)

$6\div 2.4$

(15)

$7.8\div 6.5$

(16)

$2.5\div 0.7$　(商を${\frac {1}{10}}$の位まで求め，余りをだしましょう。)

(17)

$4.9\div 2.3$　(商を${\frac {1}{10}}$の位まで求め，余りをだしましょう。)

(18)

$17.5\div 9.6$　(商を${\frac {1}{10}}$の位まで求め，余りをだしましょう。)

(19)

$7.2\div 2.9$　(商を四捨(しゃ)五入で${\frac {1}{10}}$の位までの概(がい)数で表しましょう。)

(20)

$2.6\div 1.5$　(商を四捨五入で${\frac {1}{10}}$の位までの概数で表しましょう。)

分数のたし算・ひき算

1.次の計算をしましょう。

(1)

${\frac {3}{5}}+{\frac {4}{5}}$

(2)

${\frac {2}{7}}+{\frac {4}{7}}$

(3)

${\frac {3}{8}}+{\frac {1}{8}}$

(4)

${\frac {4}{9}}+{\frac {7}{9}}$

(5)

${\frac {5}{6}}+{\frac {1}{6}}$

(6)

${\frac {7}{5}}-{\frac {4}{5}}$

(7)

${\frac {5}{7}}-{\frac {3}{7}}$

(8)

${\frac {7}{9}}-{\frac {4}{9}}$

(9)

${\frac {7}{6}}-{\frac {3}{6}}$

(10)

$1-{\frac {3}{8}}$

2.次の計算をしましょう。

(1)

${\frac {1}{2}}+{\frac {1}{4}}$

(2)

${\frac {1}{2}}+{\frac {2}{5}}$

(3)

${\frac {3}{7}}+{\frac {1}{3}}$

(4)

${\frac {3}{4}}+{\frac {5}{6}}$

(5)

${\frac {1}{3}}+{\frac {2}{5}}$

(6)

${\frac {2}{3}}+{\frac {5}{6}}$

(7)

${\frac {1}{6}}+{\frac {1}{2}}$

(8)

${\frac {2}{5}}+{\frac {4}{15}}$

(9)

${\frac {1}{10}}+{\frac {1}{15}}$

(10)

${\frac {1}{6}}+{\frac {1}{18}}$

(11)

${\frac {2}{3}}-{\frac {1}{2}}$

(12)

${\frac {5}{6}}-{\frac {2}{3}}$

(13)

${\frac {4}{5}}-{\frac {2}{3}}$

(14)

${\frac {7}{6}}-{\frac {3}{8}}$

(15)

${\frac {2}{3}}-{\frac {3}{7}}$

(16)

${\frac {13}{10}}-{\frac {4}{5}}$

(17)

${\frac {4}{3}}-{\frac {5}{6}}$

(18)

${\frac {17}{15}}-{\frac {3}{10}}$

(19)

${\frac {9}{10}}-{\frac {2}{5}}$

(20)

${\frac {2}{3}}-{\frac {1}{6}}$

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/答え