125 + 2.[56 – 48 : (14 – 2.6)2]
Thực hiện phép tính, (tính hợp lý nếu có thể)
a) (-12) + 56 + (-14)
b) 120 : 22 + 56 . 33
c) (-127) .741 + 259 .127 – 254
d) 123 + 2020 : { 101. [105 – (3+7)2]}
e) (-125 + 48) – (-125 + 53)
a: =-26+56=30
e: =-125+48+125-53=-5
125 - 2.[ 56 - 48 :(15-7)
Giải giúp mình bài này đi gấp lắm...!!!!!
= 152 - 2. ( 56 - 48 : 8 )
= 152 - 2. (56 - 6 )
= 152 - 2. 50
= 152 - 100
= 52
Hk tốt
152 - 2 .[66 - 48:8]
= 152 - 2 . [56-6]
=152 - 2 . 50
= 152 - 100
= 52
vay ket qua bang 52
~~~~;
ahihi
Bµi 1 1 37064 – 64 x 82 42966 217 2 320 – 120.5 95,25 5,25 874 12 x 12,53 132 x 9 132 4 48 x 17 48 x 3 5 56 x 27 56 x 35 62 6 45 x 48 – 90 x 24 145 7 754 x 75 – 2262 x 25 4568 8 1050 15 – 350 5 1769 4320 9 – 8640 18 750 10 316 192 384 321 108 11 24 25 26 ….. 124 125 126 12 154 – 153 152 – 151 150 – 149 ….. 4 – 3 2 – 113 37 x 38 – 19 x 74 1000 14 0.48 x 500 – 2.4 x 40 x 2
A)5⁶:5⁴+2³.2²-1²⁰¹⁷ B)125-2.[56-48:15-7] C)2448:[119-23-6] Mk đg gấp mn giứp mk nha
c: \(2448:\left[199-23-6\right]\)
\(=2448:90\)
\(=\dfrac{136}{5}\)
a) \(5^6:5^4+2^3.2^2-1^{2017}\)
\(=5^2+2^5-1=25+32-1=56\)
Bài 1:tính hợp lí
a)80-(4x5 mũ 2-3x2 mũ 3)
b)125-2x[56-48:(15-7)]
Xong rùi đó>:)) :D
a) 80-(4x5^2-3x2^3)
= 80-(4x25-3x8)
= 80-(100-24)
= 80-76
= 4
b) 125-2x[56-48:(15-7)]
= 125-2x[56-48:8]
= 125-2x[56-6]
=125-2x50
=125-100
=25.
Tính (-48)+127+(-52)+73 (-38)x45+(-38)x55 (-125)+371+(-875)+629+150 271+(-392)+729+(-608+(-123) (-48)x25+25x(-52) 47x(-11)+47 56-7x8+11 -42+51+2+(-11)+40
a) \(\left(-48\right)+127+\left(-52\right)+73\)
\(=\left(-48-52\right)+\left(127+73\right)\)
\(=-100+200\)
\(=100\)
b) \(\left(-38\right)\cdot45+\left(-38\right)\cdot55\)
\(=\left(-38\right)\cdot\left(45+55\right)\)
\(=\left(-38\right)\cdot100\)
\(=-3800\)
c) \(\left(-125\right)+371+\left(-875\right)+629+150\)
\(=\left(-125-875\right)+\left(371+629\right)+150\)
\(=-1000+1000+150\)
\(=150\)
d) \(271+\left(-392\right)+729+\left(-608\right)+\left(-123\right)\)
\(=\left(271+729\right)+\left(-392-608\right)-123\)
\(=1000-1000-123\)
\(=-123\)
e) \(\left(-48\right)\cdot25+25\cdot\left(-52\right)\)
\(=25\cdot\left(-48-52\right)\)
\(=25\cdot-100\)
\(=-2500\)
f) \(47\cdot\left(-11\right)+47\)
\(=47\cdot\left(-11+1\right)\)
\(=47\cdot-10\)
\(=-470\)
g) \(56-7\cdot8+11\)
\(=56-56+11\)
\(=0+11\)
\(=11\)
h) \(-42+51+2+\left(-11\right)+40\)
\(=\left(-42+2\right)+\left(51-11\right)+40\)
\(=-40+40+40\)
\(=0+40\)
\(=40\)
a: =-48-52+127+73
=200-100
=100
b; \(=-38\left(45+55\right)=-38\cdot100=-3800\)
c: \(=-125-875+371+629+150\)
=-1000+1000+150
=150
d: =271+729-392-608-123
=1000-1000-123
=-123
e: =25(-48-52)
=25*(-100)
=-2500
f: =47(-11+1)
=47(-10)
=-470
g: =56-56+11
=11
h: =-42+2+51-11+40
=-40+40+40
=40
4)(3 1/2 + 2x) : 3/14 = 7/12
5)1/4 + 1/3 : (3x) = -5
6)2 7/9 - 3/4 (x+1) = 7/9
4:
=>(2x+3,5)=7/12*3/14=21/168=1/8
=>2x=1/8-7/2=1/8-28/8=-27/8
=>x=-27/16
5: =>1/3:3x=-21/4
=>3x=-1/3:21/4=-1/3*4/21=-4/63
=>x=-4/189
6: =>2+7/9-3/4(x+1)=7/9
=>2-3/4(x+1)=0
=>3/4(x+1)=2
=>x+1=2:3/4=2*4/3=8/3
=>x=5/3
a)14/56=1/y-1 b)y+3/125=2/5
1/4=1/y-1
1/4+1=1/y
5/4=1/y
=> y=4/5
b)
y+3/125=2/5
y=2/5-3/125
y=47/125
k mk nha!!!!! ^-^
a) \(\frac{14}{56}=\frac{1}{y}-1\)
\(\Rightarrow\frac{1}{y}-1=\frac{1}{4}\)
\(\frac{1}{y}=1+\frac{1}{4}\)
\(\frac{1}{y}=\frac{5}{4}\)
\(y=1:\frac{5}{4}\)
\(y=\frac{4}{5}\)
b) \(y+\frac{3}{125}=\frac{2}{5}\)
\(y=\frac{2}{5}-\frac{3}{125}\)
\(y=\frac{47}{125}\)
a.205-{102-[48-(16-14)mux3]}
b.{[10-2.3).5]+2-2.6}:2+(4+5)mũ2
c.(2 mũ3. 9 mũ 4+9 mũ3.45):(9 mũ 2.10-9 mũ 2)
d.18.[(3 mũ 4.24+3 mũ 4.4-27.3 mũ 4)-71.1 mũ 20]-8