Question

Thực hiện các phép tính :

a) \(204-84:12\)

b) \(15.2^3+4.3^2-5.7\)

c) \(5^6:5^3+2^3.2^2\)

d) \(164.53+47.164\)

Answer 1

a)

204 - 84:12 = 204 - 7 = 197

b)

15.2³ + 4.3² - 5.7 = 15.8 + 4.9 – 5.7 = 120 + 36 - 35 = 121

c) Áp dụng:

a^m . aⁿ = a^m+n

a^m : aⁿ = a^m-n

5⁶:5³ + 2³.2² = 5³ + 2⁵ = 125 + 32 = 157

d)

164.53 + 47.164 = 164(53 + 47) = 164.100 = 16400

Answer 2

a) 204 - 84 : 12

= 204 - 7 = 197

b) 15.2³ + 4.3² - 5.7

= 15.8 + 4.9 - 35

= 120 + 36 - 35

= 156 - 35

= 121

c) 5⁶ : 5³ + 2³.2²

= 5^{6 - 3} + 2^{3 + 2}

= 5³ + 2⁵

= 125 + 32

= 157

d) 164.53 + 47.164

= 164.( 53 + 47 )

= 164.100

= 16400

Answer 3

a) 204 - 84 : 12

= 204 - 7 = 197

b) 15.23 + 4.32 - 5.7

= 15.8 + 4.9 - 35

= 120 + 36 - 35

= 156 - 35

= 121

c) 56 : 53 + 23.22

= 56 - 3 + 23 + 2

= 53 + 25

= 125 + 32

= 157

d) 164.53 + 47.164

= 164.( 53 + 47 )

= 164.100

= 16400

Answer 4

a) 204 - 84 : 12

=204 - 7

= 197

b)15 . 2³ + 4 . 3² - 5 . 7

=15 . 8 + 4 . 9 - 5 . 7

= 120 + 36 - 35

= 156 - 35

= 121

c)5⁶ : 5³ + 2³ . 2²

⁼ 5³ + 2⁵

= 125 + 32

= 93

d)164 . 53 + 47 . 164

=164 . ( 53 + 47)

=164 . 100

= 16400