Question

Bài 1 : phân tích ra thừa số nguyên tố
a) 27, 30, 80,20,120, 90

b)16,48,98,36,124

c) 15, 100,112,224,184

d) 56, 72, 45, 54, 177
sos

Answer 1

a) 27 = 3 . 3 . 3

30 = 5 . 2 . 3

80 = 5 . 2 . 2 . 2 . 2

20 = 2 . 2 . 5

120 = 5 . 3 . 2 . 2 . 2

90 = 5 . 3 . 3 . 2

b) 16 = 2 . 2 . 2 . 2

48 = 2 . 2 . 2 . 2 . 3

98 = 2 . 7 . 7

36 = 2 . 2 . 3 . 3

124 = 2 . 2 . 31

c) 15 = 5 . 3

100 = 2 . 2 . 5 . 5

112 = 2 . 2 . 2 . 2 . 7

224 = 2 . 2 . 2 . 2 . 2 . 7

184 = 2 . 2 . 2 . 23

d) 56 = 2 . 2 . 2 . 7

72 = 2 . 2 . 2 . 3 . 3

45 = 3 . 3 . 5

54 = 2 . 3 . 3 . 3 

177 = 3 . 59

Answer 2

mik cảm ơn nhé bạn võ thành ân