【中学1年数学】1-3 乗法と除法｜問題集
1.次の計算をしなさい。
(1)\((-13)×(-2)\)
\(+26\)
(2)\((+4)×(-4)\)
\(-16\)
(3)\((-6)×(+1.5)\)
\(-9\)
(4)\(\displaystyle (+7)×\left(+\frac{1}{3}\right)\)
\(\displaystyle +\frac{7}{3}\)
(5)\(\displaystyle 3×\left(-\frac{1}{2}\right)×(-14)\)
\(+21\)
(6)\((-5)^2×(-2^3)\)
\(-200\)
(7)\((-21)÷(+7)\)
\(-3\)
(8)\((-54)÷(-9)\)
\(+6\)
(9)\(3.6÷(-0.4)\)
\(-9\)
(10)\(\displaystyle \frac{4}{7}÷\left(-\frac{5}{2}\right)\)
\(\displaystyle -\frac{8}{35}\)
(11)\(\displaystyle (-3)×\frac{5}{12}÷(-5)\)
\(\displaystyle +\frac{1}{4}\)
(12)\(3÷15×(-5)^3\)
\(-25\)
(13)\(-13-(-2)×5\)
\(-3\)
(14)\(\displaystyle (-12)-(-18)÷\left(-\frac{2}{3}\right)\)
\(-39\)
(15)\((-10)÷2-3×(-2)\)
\(+1\)
(16)\(-1-8÷4×(-5)\)
\(+9\)
(17)\((-3)^2-7^2×(-2)\)
\(+107\)
(18)\(50÷\{(-6)+(-4)\}\)
\(-5\)
(19)\((-9)×(-7)\)
\(+63\)
(20)\((+5)×(-3)\)
\(-15\)
(21)\((-1)×(+4)\)
\(-4\)
(22)\((-17)×0\)
\(0\)
(23)\(\displaystyle \left(+\frac{2}{3}\right)×\left(+\frac{6}{7}\right)\)
\(\displaystyle +\frac{4}{7}\)
(24)\(\displaystyle (-1.8)×\left(+\frac{5}{3}\right)\)
\(-3\)
(25)\((-24)÷(-6)\)
\(+4\)
(26)\((+39)÷(-13)\)
\(-3\)
(27)\(0÷(-14)\)
\(0\)
(28)\((-8)÷(+12)\)
\(\displaystyle -\frac{2}{3}\)
(29)\((-5.6)÷(+0.7)\)
\(-8\)
(30)\(\displaystyle \left(-\frac{7}{9}\right)÷\left(+\frac{14}{3}\right)\)
\(\displaystyle -\frac{1}{6}\)
(31)\((+7)×(-4)÷(-2)\)
\(+14\)
(32)\(-3÷6×(-12)\)
\(+6\)
(33)\((-4)^3\)
\(-64\)
(34)\(\displaystyle (-8)×\frac{3}{2}×\left(-\frac{6}{5}\right)\)
\(\displaystyle +\frac{72}{5}\)
(35)\((-2)^3×(-3)\)
\(+24\)
(36)\(\displaystyle 18÷(-24)×\left(-\frac{4}{5}\right)\)
\(\displaystyle +\frac{3}{5}\)
(37)\(-6-(-2)×3\)
\(0\)
(38)\(12-8÷(-4)\)
\(+14\)
(39)\(4÷(-1)+(-2)×(-7)\)
\(+10\)
(40)\(-5^3×(-2)-15\)
\(+235\)
(41)\(\displaystyle \frac{9}{4}÷\left(-\frac{3}{2}\right)-\left(-\frac{3}{2}\right)\)
\(0\)
(42)\(\displaystyle -(-3)^2-\left(-\frac{2}{3}\right)×\frac{3}{4}\)
\(\displaystyle -\frac{17}{2}\)
(43)\((+4)+(-9)\)
\(-5\)
(44)\((-6)-(-2)\)
\(-4\)
(45)\(-8+12\)
\(+4\)
(46)\(-31-7\)
\(-38\)
(47)\(0-(-11)\)
\(+11\)
(48)\(-5+5\)
\(0\)
(49)\(6×(-4)\)
\(-24\)
(50)\((-1.4)×(-5)\)
\(+7\)
(51)\(-18÷6\)
\(-3\)
(52)\(4.5÷(-0.9)\)
\(-5\)
(53)\(-4+1-(-5)\)
\(+2\)
(54)\(5-(-8)-7-10\)
\(-4\)
(55)\(-23-(+59)+23\)
\(-59\)
(56)\(-7+13-8+12\)
\(+10\)
(57)\((-7)×(-2)×(-3)\)
\(-42\)
(58)\((-24)÷(-4)÷(-2)\)
\(-3\)
(59)\(-12÷(-8)×2\)
\(+3\)
(60)\(-2^3×(-3)\)
\(+24\)
(61)\(-7-3×5\)
\(-22\)
(62)\(5+(-16)÷2\)
\(-3\)
(63)\(6×(-3)-(-7)×(-3)\)
\(-39\)
(64)\((-5)×(-4)-8÷4\)
\(+18\)
(65)\(\displaystyle -\frac{5}{6}+\frac{1}{3}\)
\(\displaystyle -\frac{1}{2}\)
(66)\(\displaystyle (-12)×\frac{5}{6}\)
\(-10\)
(67)\(-5-\{-12-(-20)\}\)
\(-13\)
(68)\(9-6^2÷(-3^2)\)
\(+13\)
(69)\(\displaystyle \frac{2}{3}-\left(-\frac{1}{2}\right)^2÷\frac{3}{4}\)
\(\displaystyle +\frac{1}{3}\)
(70)\(\displaystyle \frac{4}{3}×\left(-\frac{2}{7}\right)-\frac{4}{7}÷\left(-\frac{3}{2}\right)\)
\(0\)
2.次の数を素因数分解しなさい。
(1)\(30\)
\(2×3×5\)
(2)\(98\)
\(2×7^2\)
(3)\(200\)
\(2^3×5^2\)
(4)\(240\)
\(2^4×3×5\)
次の学習に進もう！