a)  7 − 3 4 5 .3 1 8 − 1 3 5 : 0 , 5 2 = 7 − 19 5 . 25 8 − 8 5 : 1 2 2 = 35 5 − 19 5 . 25 8 − 8 5 . 1 4 = 16 5 . 25 8 − 2 5 = 10 − 2 5 = 48 5 .

b)  − 1 5 8 + 1,25: 1 − 9 4 = − 13 8 + 125 100 : 4 4 − 9 4 = 13 8 + 5 4 : − 5 4   = 13 8 + 5 4 . − 4 5 = 13 8 + − 1 = 5 8 .

c) 7³ : 7 - 4⁵ : 4³

= 7² - 4²

= 49 - 16

= 33

d) 8⁷ : 8⁴ : 8² + 8

= 8 + 8

= 16

a) 6³ : 6² + 94

= 6 + 94

= 100

b) 135 - 5⁴ : 5²

= 135 - 5²

= 135 - 25

= 110

\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=135-25=110\\ c,7^3:7-4^5:4^3=7^2-4^2=49-16=33\\ d,8^7:8^4:8^2+8=8+8=16\)

câu b 5 mũ 4 vứt đi hả ANH

\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=110\\ c,7^3:7-4^5:4^3=7^2-4^2=33\\ d,8^7:8^4:8^2+8=8+8=16\)

a,6³:6²+94=6+94=100

b,135-5⁴:5²=135-5²=135-25=110

c,7³:7-4⁵:4³=7²-4²=49-16=33

d,8⁷:8⁴:8²+8=8+8=16.

\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=135-25=110\\ c,7^3:7-4^5:4^3=7^2-4^2=49-16=33\\ d,8^7:8^4:8^2+8=8^2+8=64+8=72\)

= 135 + 135 - 135

=  135 +0

= 135

135

x+7=135 - (135+89)

x+7= 135 - 224

x+7= -89

x = -89-7

x = -96

Vậy x = -96

x+7=135-(135+89)

x+7=135-224

x+7= -89

x= -89 -7

x= -96

Vậy x=-96

x + 7 = 135 - 224

x + 7 = -89

x = -89 -7

x = -96

Vậy x = -96

\(\left(135-7\right)\times5-135\times5+35\)

\(=135\times5-7\times5-135\times5+35\)

\(=135\times\left(5-5\right)-35+35\)

\(=0+0=0\)

\(\left(135-7\right).5-135.5+35\)

\(=\left(135-7-135\right).5+35\)

\(=-7.5+35\)

\(=0\)

lê thị lâm ler

X+7= -89

X= -89 - 7

X= -96

x+7=135-(135+89)

=>x+7=135-135-89

=>x+7=0-89=-89

=>x=-89-7

=>x=-96

x + 7 = 135 - 135 - 89

x + 7 = 0 -89

x + 7 = -89

     x= -89 - 7

     x= -96