Question

[Bui Do Nam Huy]

tim chu so tan cung cua 

a) 7 mu 35 - 4 mu 31

b) 2 mu 1930 . 9 mu 1945

Answer 1

[soyeon_Tiểu bàng giải]

a) 7³⁵ - 4³¹

= 7³².7³ - 4²⁸.4³

= (7⁴)⁸.343 - (4⁴)¹⁴.64

 = (...1)⁸.343 - (...6)¹⁴.64

= (...1).343 - (...6).64

= (...3) - (...4)

= (...9)

b) 2¹⁹³⁰.9¹⁹⁴⁵

= 2¹⁹²⁸.2².9¹⁹⁴⁴.9

= (2⁴)⁴⁸².4.(9⁴)⁴⁸⁶.9

= (...6)⁴⁸².4.(..1)⁴⁸⁶.9

= (...6).4.(...1).9

= (...6)

Answer 2

[Thái Viết Nam]

a) 9

b)2

Tớ cũng không chắc lắm