\(A=3\cdot5^2-4\cdot2^3\\ =3\cdot25-4\cdot8\\ =75-32\\ =43\\ B=3\cdot5^2+3:5^0-48:2^3\\ =3\cdot25+3-48:8\\ =75+3-6\\ =72\\ C=120+40:4-3\cdot5^2\\ =120+10-75\\ =55\\ D=5\cdot2^3-36:3^2\\ =5\cdot8-36:9\\ =40-4\\ =36\)

a) \(3.5^2-16\div2^2=3.25-16\div4=75-4=71\)

b) \(2^3.17-2^3.14=2^3.\left(17-14\right)=8.3=24\)

c) \(15.141+59.15=15.\left(141+59\right)=15.200=3000\)

d) \(17.85+2^3.14=1445+8.14=1445+112=1557\)

e) \(20-\left[30-\left(5-1\right)^2\right]=20-\left[30-4^2\right]=20-\left[30-16\right]=20-14=6\)

Cảm ơn bạn greninja nha😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀     mình là người làm câu hỏi nè

A) 3 . \(5^2\)- 16 : \(2^2\)= 3 . 25 - 16 : 4 = 75 - 4 = 71

B) 20 - [30-(5-\(1^2\)) ] = 20 - [30- (5-1) = 20 - [30 - 4 ] = 20 - 26 = -6

C) 22 . 7 - 2³ . 14 = 22 . 17 - 8 = 364 - 8 = 356

D) 17.85 + 15.17-120 = 17 . ( 85 + 15 ) -120= 17 . 100 -120 = 1700 - 120 = 1580

k cho mính nhé bn

câu C) ban ghi kho hieu qua

a.75-(3.5^2-4.2^3)

=75-(-5)

=80

b.-/-12/+12-(-24)

= - 12 + 12 - 24

=0-24

=-24

c.17.85+15.17-120

=17.(85+15)-120

=17.100-120

=1700-120

=1580

bài 2: tìm x

a. 70-5.(x-3)=45

5.(x-3)=70-45=25

x-3=25:5=5

x=5+3=8

vậy x=8

\(A=4^3-6^3:6^2+11\cdot3^2\\ =64-6+11\cdot9\\ =58+99\\ =157\\ B=5\cdot35-5^2\cdot2\\ =5\cdot\left(35-10\right)\\ =5\cdot25\\ =125\\ C=\left(7-3^3:3^2\right):2^2+99\\ =\left(7-3\right):4+99\\ =4:4+99\\ =1+99=100\\ D=2^7:2^2+5^4:5^3\cdot2^4-3\cdot2^5\\ =2^5+5\cdot2^4-6\cdot2^4\\ =2^4\cdot\left(2+5-6\right)\\ =2^4\\ =16\)

đợi tý

a) 157

b) 125

c) 100

d) 16

a) 0

b) 0

c) 0

d) 0

\(5.2^2-18:3\)

\(=5.4-18:3\)

\(=20-6=14\)

\(2^3.17-2^3.14\)

\(=8.17-8.14\)

\(=8.\left(17-14\right)\)

\(=8.3\)

\(=24\)

\(75-\left(3.5^2-4.2^3\right)\)

\(=75-\left(3.25-4.8\right)\)

\(=75-\left(75-32\right)\)

\(=75-43\)

\(=32\)

\(150+50:5-2.3^2\)

\(=150+50:5-2.9\)

\(=150+10-18\)

\(=142\)

#Rảnh

\(2.5^2+3:71^0-54:3^3\)

\(=2.25+3:1-54:27\)

\(=50+3-2\)

\(=51\)

\(5.3^2-32:4^2\)

\(=5.9-32:16\)

\(=45-2\)

\(=43\)