■ Hello School 数学(ハロ数) Ver.2 中1 1次不等式(計算) 練習問題 ■ |
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1.次の方程式を解きなさい。
(1) 6x+6≦12(x-3) (2) 2(3x+15)≧3(x-1) (3) 3(x+1)-(-x-5)
<40
(4) 5x-(7x-26)-3(x+2) < 0 (5) 6x-(-2x+3)≦4(x+1)-2x-25 (6) 2x-3{x-(4x+1)}≧25
(7) -7x+2{3x-2(x+7)}≦4{3(x+1)-2(3x-2)} (8) 2x-1≦57-3[x-{-(6-x)+4x}]
(9) 3{2x-3(x-1)}+78≦3[-4x-2{-6x-(x-2)}] (10) 2[x-4{3x-5(x+1)}]
> -3[2x-3{2x-6(x-2)}]-8
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2.次の方程式を解きなさい。
(1) 0.2x+1≧0.6x-1 (2) 3.4x-0.6 > 1.8x+2.6 (3) 0.2(3x-8)≧-0.7x-0.3
(4) 0.3(0.2x-0.4) < 0.3 (5) 0.1(3x-5)-0.4≧3(1.4x+1) (6) 3(0.5x-0.2)-0.8(3x-5)
> 2-0.8(x-3)
(7) -0.3(2x-4)+0.2(x-2) < 2 (8) 0.5(2x-3)-6 > 0.2(4x-3)-0.3(x-2)
(9) 0.3-{0.2(x+1)-0.6x}≧=0.5x-0.3 (10) 0.6x-0.8≦0.9x-[0.6-{x-(0.7x-0.4)}]
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3.次の方程式を解きなさい。
(1) -0.3x-2≧-0.9x+10 (2) 1.4x-0.7≦-1.4x-17.5 (3) 0.9(2x-5)≧-0.8x-1.9
(4) 0.4(0.6x-0.1) > 1.4 (5) 0.2(2x-3)-1.4≦4(1.6x+4) (6) 5(0.7x-0.1)-0.3(8x-7)
> 7-0.2(2x-3)
(7) -0.7(3x-4)+0.3(2x-1)≧7 (8) 0.3(3x-5)-0.1≦0.7(3x-7)-0.5(3x-3)
(9) 0.7-{0.3(x+3)-0.5x} > 0.4x-0.6 (10) 0.7x-2≦0.8x-[1.1-{x-(0.5x-0.9)}]
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4.次の方程式を解きなさい。
(1) 0.6x+2≧1.4x-6 (2) 2.1x-1.9 < 1.8x+0.8 (3) 0.7(5x+2)≦-0.8x-2.9
(4) 0.2(0.8x-0.3) > 0.9 (5) 0.9(x-3)-0.2≦=4(0.2x-0.7) (6) 2(0.7x-0.3)-0.6(2x-3)≧13-0.5(3x-7)
(7) -0.4(3x-1)+0.3(x-4)≧-8 (8) 0.8(3x-2)-8.3 > 0.3(6x-5)-0.4(x-9)
(9) 0.4-{0.9(2x-3)-0.3x}≧-0.3x-0.5 (10) 0.2x-0.5≦0.7x-[2.1-{0.8x-(2.3x-3.6)}]
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5.次の方程式を解きなさい。
(1) -0.5x-7≦-0.7x-9 (2) 3.8x-5.4 > 2.4x+1.6 (3) 0.3(7x-2)≧-5.9x+15.4
(4) 1.2(0.4x-0.1) > 0.36 (5) 0.8(x-6)-3.4≦7(0.5x-0.4) (6) 8(0.1x-0.3)-0.4(6x-1)≦-0.9(2x-6)
(7) -1.6(-6x-1)+1.8(3x-7) < 19 (8) 0.7(4x-4)-1≧3.4(2x-6)-4.2(x-1)
(9) 0.6-{0.6(6x-6)-0.1x}≦0.5x+0.2 (10) 0.8x+1.4≧0.9x-[3.1-{0.2x-(1.6x-1.9)}]
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6.次の方程式を解きなさい。
(1) 4.2x-3 < 1.2x-15 (2) 5.4x-1.3 > 4.6x-3.7 (3) 3.8(0.7x-0.9)≧-0.59x-0.17
(4) 6.7(0.4x-0.5)≦-0.32x-0.35 (5) 2.7(2x-1)-1.8≦9(0.3x-0.2) (6) 7(0.8x-1.3)-0.3(8x-7)≦5-0.8(4x-1)
(7) -9.2(4x+3)-4.1(2x-6)≦17-6.5(2x+8) (8) 0.9(4x-1)-3 <
0.6(6x-1)-0.3(x-1)
(9) 0.8-{0.5(3x-5)-0.4x} > =0.3x+0.5 (10) -1.4x-0.4 <
0.2x-[3.1-{0.4x-(2.9x-4.5)}]
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7.次の方程式を解きなさい。
(1) 2.6x+3≧5.2x-10 (2) 3.8x-7.1 < 3.4x+9.3 (3) 4.6(0.3x-0.4)
> 0.08x+0.76
(4) 5.4(0.7x-0.6)≦-2.4x+2.94 (5) 3.2(3x+8)-14≧7(0.8x-1.2) (6) 4(0.9x-0.4)-0.7(2x-3)
< 4-0.9(2x-5)
(7) -2.1(6x-1)+4.3(4x+3) > 8-3.4(x+5) (8) 0.7(2x-3)-0.3
> 0.9(2x-3)-0.5(2x-3)
(9) 0.3-{0.4(7x-3)-0.3x}≧0.2x-1.2 (10) 0.8x+1.5 > 0.1x-[4.3-{0.2x-(1.6x-3.7)}]
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12.次の方程式を解きなさい。
(3) -3x+ |
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14.次の方程式を解きなさい。
(1) 2x+3 |
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(2) -3x+4 |
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2x- |
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(3) -7x+2 |
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(4) x-5 |
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6x+ |
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(5) -5x+9 |
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(6) -x-3 |
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(7) -9x+6 |
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(8) 5x+2 |
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(9) 7x+2 |
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(10) 4x- |
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15.次の方程式を解きなさい。
(1) |
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(2) |
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(3) |
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(5) |
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(6) -0.2x-0.3 |
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(7) 0.8x+0.4 |
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(8) -0.3x-0.7 |
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(9) 0.2x+0.9 |
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(10) -0.125x-0.25 |
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16.次の方程式を解きなさい。
(3) |
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-0.3(4x-3) |
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-0.7(x+8) |
(4) |
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+3+2 |
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-3 |
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(5) |
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(7) 0.24 |
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-0.25(11-19x) |
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(8) |
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(9) 0.8 |
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+0.75 |
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>0.8 |
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-0.4 |
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(10) |
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0.625 |
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解答と解説 |
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商用目的での利用を固く禁じます。 |