(7)かっこの計算(解答) | 学習日 月 日( ) | ||
|
次の計算をしなさい。 | ||||||||
1 | 2(x+3)+3(x−1) = 2x+6+3x−3 = 5x+3 |
2 | 5(x−2)+3(x−2) = 5x−10+3x−6 = 8x−16 |
|||||
3 | 4(x+5)−2(x+8) = 4x+20−2x−16 = 2x+4 |
4 | 3(x−4)−(4x−10) = 3x−12−4x+10 = −x−2 |
|||||
5 | 6(2a−5)+4(−3a+7) = 12a−30−12a+28 = −2 |
6 | −2(x−3)+5(1+2x) = −2x+6+5+10x = 8x+11 |
|||||
7 | 2(3x+5y)+3(x−3y) = 6x+10y+3x−9y = 9x+y |
8 | 4(2x+y)−3(2x−y) = 8x+4y−6x+3y = 2x+7y |
|||||
9 | 2(3a+4b−5)+3(2a−3b+4) = 6a+8b−10+6a−9b+12 = 12a−b+2 |
10 |
= 3x−4y−x−3y = 2x−7y |
[トップに戻る] [問題に戻る] |