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a) 47 - [(45.16 - 25.12 ) : 14]
= 47 - [ (720 - 300 ) : 14
= 47 - [ 420 : 14 ]
= 47 - 30
= 17
b) 50 - [ (20 - 8 ) : 2 + 34 ]
= 50 - [ 12 : 2 + 34 ]
= 50 - [ 6 + 34 ]
= 50 - 40
= 10
c) 100 - [ 60 : ( 15625 : 625 - 15 )
= 100 - [ 60 : ( 25 - 15 ) ]
= 100 - [ 60 : 10 ]
= 100 - 6
= 94
d)50-[(50-235)/2+3
=50-(10/2+3)
=50-8
=42
minh chi giupban duoc den do thoi ha
\(5.2^2-18:3\)
\(=5.4-18:3\)
\(=20-6=14\)
\(2^3.17-2^3.14\)
\(=8.17-8.14\)
\(=8.\left(17-14\right)\)
\(=8.3\)
\(=24\)
\(75-\left(3.5^2-4.2^3\right)\)
\(=75-\left(3.25-4.8\right)\)
\(=75-\left(75-32\right)\)
\(=75-43\)
\(=32\)
\(150+50:5-2.3^2\)
\(=150+50:5-2.9\)
\(=150+10-18\)
\(=142\)
#Rảnh
sau 58 ,7,50 ,2,-60 là phép tính khác .
mấy b giúp mk nha ?
a)4.15 + 28:7 - 620:618
= 60 + 4 - 62
= 60 + 4 - 36
= 28
b)(32+23.5) : 7
= (9+ 8.5):7
=(9+ 40):7
=49 : 7
=7
c)1125:1123-35:(110+23)-60
= 112 - 243 : (1+8)-60
= 121 -243 : 9 - 60
= 121 - 27 - 60
= 34
d)520:(515.6+515.19)
= 520:(515.(6+19)
= 520 : 515 . 25
= 55.25
= 3125.25
=78125
e)718: 716+22.23
= 72+ 25
= 49 + 32
= 81
f) 59.73 - 302+27.59
= 59.(73+27)-302
= 59.100- 900
= 5900 - 900
= 5000
Trần Tuyết Tâm
a,3.52 + 15.22 - 26:2
=3.25 + 15.4 -26:2
=75+60-13
=122
b,53.2 - 100:4 + 23.5
=125.2 - 100:4 + 8.5
=250 - 25 +40
=265
c,62:9 + 50.2 - 33.3
=36:9 + 50.2 -27.3
=4 + 100 -81
=23
d,32.5 + 23.10 - 81:3
=9.5 +8.10 - 81:3
=45 + 80 -27
=98
e,513:510 - 25.22
=53 - 25.4
=125 - 100
=25
a) 3.52 + 15.22 - 26:2
=3.25 + 15.4 - 13
=75 + 60 -13
=117
b) 53.2 - 100:4 +23.5
=125.2 -25 + 8.5
=250 - 25 + 40
=265
c)62 : 9 + 50.2 - 33.3
=36:9 + 100 - 37.3
=4 + 100 - 81
=23
d)32.5 + 23.10 - 81:3
=9.5 + 8.10 - 27
=45 + 80 - 27
=98
e)513 : 510 - 25.22
=53 - 25.4
=125 - 100
=25
K NHA
=-7
\(a)47-\left[\left(45.2^4-5^2.12\right):14\right]\)
\(=47-\left[\left(45.16-25.12\right):14\right]\)
\(=47-\left[\left(720-300\right):14\right]\)
\(=47-\left[420:14\right]\)
\(=47-30\)
\(=17\)
\(b)50-\left[\left(20-2^3\right):2+34\right]\)
\(=50-\left[\left(20-8\right)\right]:2+34\)
\(=50-\left[12:2+34\right]\)
\(=50-\left[6+34\right]\)
\(=50-40\)
\(=10\)
\(c)10^2-\left[60:\left(5^6:5^4-3,5\right)\right]\)
\(=10^2-\left[60:\left(5^2-3,5\right)\right]\)
\(=10^2-\left[60:\left(25-3,5\right)\right]\)
\(=10^2-\left[60:21,5\right]\)
\(=100-\dfrac{120}{43}\)
\(=\dfrac{4180}{43}\)
\(d)50-\left[\left(50-2^3.5\right):2+3\right]\)
\(=50-\left[\left(50-8.5\right):2+3\right]\)
\(=50-\left[\left(50-40\right):2+3\right]\)
\(=50-\left[10:2+3\right]\)
\(=50-5+3\)
\(=50-8\)
\(=42\)
\(e)10-\left[\left(8^2-48\right).5+\left(2^3.10+8\right)\right]:28\)
\(=10-\left[\left(64-48\right).5+\left(8.10+8\right)\right]:28\)
\(=10-\left[16.5+\left(80+8\right)\right]:28\)
\(=10-\left[80+88\right]:28\)
\(=10-168:28\)
\(=10-6\)
\(=4\)
\(f)8697-\left[3^7:3^5+2.\left(13-3\right)\right]\)
\(=8697-\left[3^2+2.\left(13-3\right)\right]\)
\(=8697-\left[9+2.10\right]\)
\(=8697-9+20\)
\(=8697-29\)
\(=8668\)
\(g)2011+5\left[300-\left(17-7\right)^2\right]\)
\(=2011+5.\left[300-10^2\right]\)
\(=2011+5.\left[300-100\right]\)
\(=2011+5.200\)
\(=2011+1000\)
\(=3011\)
\(h)695-\left[200+\left(11-1\right)^2\right]\)
\(=695-\left[200+10^2\right]\)
\(=695-200+100\)
\(=695-300\)
\(=395\)
\(i)129-5\left[29-\left(6-1\right)^2\right]\)
\(=129-5\left[29-5^2\right]\)
\(=129-5\left[29-25\right]\)
\(=129-5.4\)
\(=129-20\)
\(=109\)
help me