分配法則を使って,次の式を展開しなさい。 |
| 1 |
(8x+6)÷2 = 4x+3
|
2 |
(3x−9)÷3 = x−3
|
| 3 |
(6x+12y)÷3 = 2x+4y
|
4 |
(25x−15y)÷5 = 5x−3y
|
| 5 |
(12a+18b)÷6 = 2a+3b
|
6 |
(4a−20b)÷4 = a−5b
|
| 7 |
(27a−18)÷3 = 9a−6
|
8 |
(6x−4)÷(−2) = −3x+2
|
| 9 |
(x3+x2)÷x = x2+x
|
10 |
(4y2−8y)÷2y = 2y−4
|
| 11 |
(8x2+28x)÷4x = 2x+7
|
12 |
(6x2−3x)÷(−3x) = −2x+1
|
| 13 |
(2x+8y+10)÷2 = x+4y+5
|
14 |
(9x2−12x−15)÷3 = 3x2−4x−5
|
| 15 |
(5x2+15xy−10x)÷5x = x+3y−2
|
16 |
(x2y−xy2)÷xy = x−y
|
| 17 |
(3ax+9ay)÷3a = x+3y
|
18 |
(−6xy+15y2−12y)÷(−3y)
= 2x−5y+4
|
| 19 |
| (3a2+ab)÷ |
 |
a |
= (3a2+ab)× |
2 |
| a |
= 6a+2b |
20 |
| (2ab−10ab2)÷ |
 |
a |
=(2ab−10ab2)× |
3 |
| 2a |
= 3b−15b2 |