Вправи: 217 (1-5)

217. Виконайте ділення:

1) x5 : x = x5 : x1 = x5 • 1x = x5 •x = 15 = 0,2;

2) 12y : 6 = 12y : 61 = 12y • 16 = 12y •6 = 2y;

3) 3x24y3 : x² = 3x24y3 : x21 = 3x24y3 • 1x2 = 3x24y3 • x2 = 34y3;

4) 6a3b2 : 3a² = 6a3b2 : 3a21 = 6a3b2 • 13a2 = 6a3b2 • 3a2 = 2ab2;

5) x : 5x = x1 : 5x = x1 • x5 = x •x5 = x25;

6) 3y : 3y = 3y : 3y1 = 3y • 13y = 3y •3y = 1y2;

7) 52x2 : x² = 52x2 : x21 = 52x2 • 1x2 = 52x2 • x2 = 52x4;

8) 6b2 : 3b² = 6b2: 3b21 = 6b2 • 13b2 = bb2 • 3b2 = 2b4;

9) 3y7 : (–y) = 3y7 : (–y1) = 3y7 • (–1y) = –3y7 •y = –37;

10) 24x325 : (–4x) = 24x325 : (–4x1) = 24x325 • (–14x) = –24x325 •4x = –6x225;

11) –67x : (–12x) = 67x : 12x1 = 67x • 112x = 67x •12x= 114x2;

12) –4y³ : 5y216 = –4y31 • 165y2 = –4y3 •165y2 = –64y5.