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a)
204-84:12
=204-7
=197
b)
15.23+4.32-5.7
=15.8+4.9-5.7
=120+36-35
=156-35
=121
c)
56:53+23.22
=56-3+23+2
=53+25
=125+32
=157
d)
164.53+47.164
=(164.(53+47)
=164.100
=16400
tìm x:
219-7(x+1)=100
=>7(x+1)=219-100
=>7(x+1)=119
=>x+1=119:7
=>x+1=17
=>x=17-1
=>x=16
(3x-6).3=34
=>(3x-6).3=81
=>3x-6=81:3
=>3x-6=27
=>3x=27+6
=>3x=33
=>x=33:3
=>x=11
a. \(3.5^2+15.2^2-26:2\)
\(=3.25+15.4-26:2\)
\(=75+60-13\)
\(=122\)
b. \(5^3.2-100:4+2^3.5\)
\(=125.2-100:4+8.5\)
\(=250-25+40\)
\(=265\)
c. \(6^2:9+50.2-3^3.3\)
\(=36:9+50.2-27.3\)
\(=4+100-81\)
\(=23\)
d. \(3^2.5+2^3.10-81:3\)
\(=9.5+8.10-81:3\)
\(=45+80-27\)
\(=98\)
e. \(5^{13}:5^{10}-25.2^2\)
\(=5^3-25.4\)
\(=125-100\)
\(=25\)
f. \(20:2^2+5^9:5^8\)
\(=20:4+5\)
\(=5+5=10\)
a) 1252 . 82 - (24)2 + 59 : 1252
=(125 . 8)2 - 24.2 + 59 : (53)2
= 10002 - 28 + 59 : 56
= 1000000 - 256 + 53
= 999744 + 125
= 999869
b) Mình ko viết đầu bài đâu nhé
=(75 : 5)2 + (25 . 4)4 - 33 . 52
= 152 + 1004 - 27 . 25
= 15. 15 + 100 . 100 . 100 . 100 - 675
= 225 + 100000000 - 675
= 100000000 - (675 - 225)
= 100000000 - 450
= 99999550
=
a, 3.5^2+15.2^2-26:2
=3.25+15.4-13
=75+60-13
=135-13
=122
b, 5^3.2-100:4+2^3.5
=125.2-25+8.5
=250-25+40
=225+40
=265
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: =6^2-15*2
=36-30=6
b: =3*25+15*4-3
=72+60
=132
c: =25*2+5
=50+5
=55
d: =5+12=17
e: =7^2(15-5)=49*10=490
f: =4^3*125-125:25
=1000-5
=995