■ Hello School 数学(ハロ数) Ver.2 中1 1次不等式(計算) 練習問題 ■ |
インターネット上で中学校の数学を勉強できるよ。 |
|
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
|
|
|
|
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)}]
|
|
|
|
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)}]
|
|
|
|
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)}]
|
|
|
|
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)}]
|
|
|
|
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)}]
|
|
|
|
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)}]
|
|
|
|
|
|
|
|
|
|
|
|
12.次の方程式を解きなさい。
(3) -3x+ |
|
≦ |
− |
|
+ |
|
(4) x+ |
|
< |
|
+ |
|
|
|
|
|
|
14.次の方程式を解きなさい。
(1) 2x+3 |
( |
x− |
|
) |
> |
|
(2) -3x+4 |
( |
2x− |
|
) |
≧ |
|
(3) -7x+2 |
( |
3x− |
|
) |
≧ |
|
(4) x−5 |
( |
6x+ |
|
) |
> |
|
(5) -5x+9 |
( |
x− |
|
) |
< |
|
(6) -x−3 |
( |
-x− |
|
) |
≧- |
|
(7) -9x+6 |
( |
3x+ |
|
) |
> |
|
(8) 5x+2 |
( |
-2x− |
|
) |
< |
|
(9) 7x+2 |
( |
-3x− |
|
) |
≦ |
|
(10) 4x− |
( |
-4x− |
|
) |
> |
|
|
|
|
15.次の方程式を解きなさい。
(1) |
|
− |
|
( |
x− |
|
) |
≧ |
|
(2) |
|
− |
|
( |
2x− |
|
) |
≦ |
|
(3) |
|
+ |
|
( |
-4x− |
|
) |
> |
|
(4) |
|
− |
|
( |
4x− |
|
) |
≦ |
|
(5) |
|
− |
|
( |
-2x− |
|
) |
< |
|
(6) -0.2x−0.3 |
( |
-3x− |
|
) |
≧ |
|
(7) 0.8x+0.4 |
( |
8x+ |
|
) |
< |
|
(8) -0.3x−0.7 |
( |
-2x− |
|
) |
≦ |
|
(9) 0.2x+0.9 |
( |
8x− |
|
) |
> |
|
(10) -0.125x−0.25 |
( |
-2x− |
|
) |
≦ |
|
|
|
|
16.次の方程式を解きなさい。
(3) |
|
−0.3(4x−3) |
≦ |
|
−0.7(x+8) |
(4) |
|
+3+2 |
{ |
−x− |
( |
|
−3 |
) |
} |
< |
|
(5) |
( |
|
− |
|
) |
[ |
|
{ |
|
− |
|
( |
|
− |
|
) |
} |
] |
≧ |
|
(7) 0.24 |
[ |
{ |
|
− |
|
} |
−0.25(11−19x) |
] |
> |
|
− |
|
(8) |
|
[ |
|
{ |
|
− |
|
( |
|
− |
|
) |
} |
] |
≦ |
|
[ |
|
{ |
|
− |
|
( |
|
− |
|
) |
} |
] |
(9) 0.8 |
[ |
|
{ |
|
+0.75 |
( |
|
− |
|
) |
} |
] |
>0.8 |
[ |
|
{ |
|
−0.4 |
( |
|
+ |
|
) |
} |
] |
(10) |
|
[ |
0.625 |
{ |
|
− |
|
( |
|
− |
|
) |
} |
] |
|
|
|
|
解答と解説 |
|
|
商用目的での利用を固く禁じます。 |