Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a: =25x100-150=2500-150=2350
c: \(=520:\left\{515\cdot25\right\}\)
=104/2575
\(a)\)
\(\left(-31\right)+\left(50-19\right)-\left(150-31\right)\)
\(=\left(-31\right)+50-19-150+31\)
\(=\left(-150\right)-19\)
\(=-169\)
\(b)\)
\(25.\left(45-17\right)-45.\left(25-17\right)\)
\(=25.45-25.17-45.25+45.17\)
\(=0\)
\(c)\)
\(\frac{-1}{12}+\frac{4}{3}=\frac{5}{4}\)
\(d)\)
\(3+\frac{-5}{20}+\frac{30}{75}+\frac{-7}{4}\)
\(=\left(\frac{3}{5}+\frac{30}{75}\right)-\left(\frac{5}{20}+\frac{7}{4}\right)\)
\(=1-2\)
\(=-1\)
a) (-31)+(50-19)-(150-31)
= (-31)+50+(-19)-150+(-31)
= (-31)+50-150+(-19)-(-31)
= (-31)+(-100)+12
= -119
b) 25(45-17)-45(25-17)
= 25.45-25.17-45.25-45.17
= 25(45-45)-25(17-17)
= 0
c) -1/12 + 4/3
= -1/12 + 16/12
= 15/12
= 5/4
d) 3/5+(-5)/20+30/75+(-7)/4
= 45/75+30/75+(-5)/20+(-35)/20
= 1+(-2)
= -1
a) \(27\cdot75+25\cdot27-150\cdot2023^0\)
\(=27\cdot\left(75+25\right)-150\cdot1\)
\(=27\cdot100-150\)
\(=2700-150\)
\(=2550\)
b) \(3^x+3^{x+1}+16\cdot4=2^2\cdot5^2\)
\(\Rightarrow3^x+3^x\cdot3=100-64\)
\(\Rightarrow3^x\cdot\left(1+3\right)=36\)
\(\Rightarrow3^x\cdot4=36\)
\(\Rightarrow3^x=36:4\)
\(\Rightarrow3^x=9\)
\(\Rightarrow3^x=3^2\)
\(\Rightarrow x=2\)
a) 27.75 + 25.27 - 150.2023⁰
= 27.(75 + 25) - 150.1
= 27.100 - 150
= 2700 - 150
= 2550
b) 3ˣ + 3ˣ⁺¹ + 16.4 = 2².5²
3ˣ.(1 + 3) + 64 = 4.25
3ˣ.4 + 64 = 100
3ˣ.4 = 100 - 64
3ˣ.4 = 36
3ˣ = 36 : 4
3ˣ = 9
3ˣ = 3²
x = 2
Bài 1: Thực hiện các phép tính sau:
\(a)\)Chưa rỏ đề
\(b)\)\(5025\div5-25\div5\)
\(=\)\(1005-5\)
\(=\)\(1000\)
\(c)\)\(218-180\div2\div9\)
\(=\)\(218-10\)
\(=\)\(208\)
\(d)\)\(\left(328-8\right)\div32\)
\(=\)\(320\div32\)
\(=\)\(10\)
Bài 1:
a) ( Tôi không nhìn rõ đầu bài )
b) 5025 : 5 - 25 : 5
= ( 5025 - 25 ) : 5
= 5000 : 5
= 1000
c) 218 - 180 : 2 : 9
= 218 - 180 : ( 2 . 9 )
= 218 - 180 : 18
= 218 - 10
= 208
d) ( 328 - 8 ) : 32
= 320 : 32
= 10
a, 28 . (-2).3 - { 136 + [54 - 28 : (69 - 71).2 ]}
=-168- { 136 + [54 - 28 : (-2).2 ]}
=-168 - [136 + (54+28)]
=-168 - 218
=-386
b) 203.46-203.37+203
=203.46-203.37+203.1
=203.(46-37+1)
=203.10
=2030
c)21+23+25+27+29-31-33-35-37-39
=(21-31)+(23-33)+(25-35)+(27-37)+(29-39)
= -10 + (-10) + (-10) + (-10) + (-10)
=-50
d) 18.17-3.6.17
=18.17-18.17
= 0
e,33. ( 107- 112) - 107 . ( 33- 112)
=33.107- 33.112- 107.33+107.112
=(33.107- 33.112- 107.33)+107.112
=33(107-112-107)+107.112
=-33.112+107.112
=112.(-33+107)
=112.74
=8288
CHÚC BẠN MAY MẮN
a) 25.69+31.25-25.6
= 25.(69+31-6)
= 25.94
= 2350
b) 198:[130-(27-19)2]+20210
= 198:[130-82]+1
= 198:(130-64)+1
= 198:66+1
= 3+1
= 4
c) 520:[515.(15+10)]
= 520:[515.25]
= 520:(515.52)
= 520: 517
= 53