ГДЗ до підручника «Алгебра» О.С. Істера. 7 клас

101. 1) p9 : p5 = p4;

2) x12 : x3 = x9;

3) 108 : 10 = 107;

4) t12 : t11 = t1.

102. 1) (c7)3 = c21;

2) (210)7 = 270;

3) (p3)5 = p15;

4) (78)11 = 788.

103. 1) (x2)4 = x8;

2) (u7)2 = a14;

3) (89)3 = 827;

4) (103)5 = 1015.

104. 1) (m3)4 = m12;

2) (p9)2 = p18;

3) (73)10 = 730;

4) (192)7 = 1914.

105. 1) x12 = x3 • x9;

2) x12 = x6 • x6;

3) x12 = x9 • x3;

4) x12 = x11 • x.

106. 1) m7 = m3 • m4;

2) c12 = c4 • c8;

3) 517 = 52 • 515;

4) p8 = p4 • p4.

109. 1) 23 • 24 = 27 = 128;

2) 36 : 31 = 35 = 243;

3) 3 • 33 • 34 = 38 = 6561;

4) 29 : 23 = 26 = 64.