Hãy luôn nhớ cảm ơn và vote 5*
nếu câu trả lời hữu ích nhé!
Đáp án Giải thích các bước giải:
`\bb a)`
`47-[( 45.2^(4)-5^(2) .12):14]`
`= 47-[(45.16-25.12):14]`
`= 47-[(720-300):14]`
`= 47-[420 : 14]`
`= 47-30 = 17`
`\bb b)`
`50-[(20-2^(3)):2+34]`
`=50 -[(20-8):2+34]`
`= 50-[12:2+34]`
`= 50-[6 + 34]`
`= 50-40 = 10`
`\bb c)`
`10^(2)-[60:(5^(6) : 5^(4)-3.5)]`
`=10^(2)-[60:(5^(6-4)-3.5)]`
`= 10^(2)-[(60:(5^(2)-3.5)]`
`=10^(2)-[60:(25-15)]`
`= 10^(2)-[60:10]`
`= 10^(2)-6`
`= 100 -6`
`= 94`
`\bb d)`
`50-[(50-2^(3).5):2+3]`
`= 50-[(50-8.5):2+3]`
`= 50-[(50-40):2+3]`
`= 50-[10:2+3]`
`= 50-[5+3]`
`= 50-8 = 42`
`\bb e)`
`10-[(8^(2)-48).5+(2^(3).10+8)]:28`
`= 10-[(64-48).5+(8.10+ 8)]:28`
`= 10-[16.5 +(80+ 8)]:28`
`= 10-[80 + 88]:28`
`= 10-168 : 28`
`= 10 - 6 = 4`
`\bb f)`
`8697-[3^(7) : 3^(5) + 2. (13-3)]`
`= 8697 -(3^(7-5)+2.(13-3)]`
`= 8697-[3^(2) + 2.(13-3)]`
`= 8697-[9+2.10]`
`= 8697 -[9 + 20]`
`= 8697-29 = 8668`
`\bb g)`
`2011 + 5.[300-(17-7 )^(2)]`
`= 2011 + 5. [300-10.2]`
`= 2011 + 5.[300-100]`
`= 2011 + 5.200`
`= 2011 + 1000 = 3011`
`\bb h)`
`695-[200+(11-1)^(2)]`
`= 695-[200+ 10^(2)]`
`= 695-[200 + 100]`
`= 695-300 = 395`
`\bb i)`
`129-5.[29-(6-1)^(2)]`
`= 129-5.[29-5^(2)]`
`= 129-5.[29-25]`
`= 129-5.4`
`= 129-20= 109`
`\bb j)`
`2010 - 2000:[486-2(7^(2)-6)]`
`= 2010-2000:[486-2(49-6)]`
`= 2010-2000:[486-2.43]`
`= 2010-2000:[486-86]`
`= 2010-2000: 400`
`= 2010-5`
`= 2005`
Hãy giúp mọi người biết câu trả lời này thế nào?
`a) 47 - [(45 . 2^4 - 5^2 . 12) : 14]`
`= 47 - [(45 . 16 - 25 . 12) : 14]`
`= 47 - [(720 - 300) : 14]`
`= 47 - [420 : 14]`
`= 47 - 30`
`= 17`
`b) 50 - [(20 - 2^3) : 2 + 34]`
`= 50 - [(20 - 8) : 2 + 34]`
`= 50 - [12 : 2 + 34]`
`= 50 - [6 + 34]`
`= 50 - 40`
`= 10`
`c) 10^2 - [60: (5^6 : 5^4 - 3.5)]`
`= 100 - [60: (5^2 - 3.5)]`
`= 100 - [60 : ((5 - 3) . 5)]`
`= 100 - [60 : 10]`
`= 100 - 6`
`= 94`
`d) 50 - [(50 -2^3 . 5) : 2 + 3]`
`= 50 - [(50 - 8 . 5) : 2 + 3]`
`= 50 - [(50 - 40) : 2 + 3]`
`= 50 - [10 : 2 +3]`
`= 50 - 8`
`= 42`
`e) 10 - [(8^2 - 48) . 5 + (2^3 . 10 + 8)] : 28`
`= 10 - [(64 - 48) . 5 + ( 8 . 10 + 8)] : 28`
`= 10 - [16 . 5 + (80 + 8)] : 28`
`= 10 - [80 + 88] : 28`
`= 10 - 169 : 28`
`= 10 - 6`
`= 4`
`f) 8697 - [3^7 : 3^5 + 2(13 - 3)]`
`= 8697 - [3^2 + 2 . 10]`
`= 8697 - [9 + 20]`
`= 8697 - 29`
`= 8668`
`g) 2011 + 5[300 - (17 - 7)^2]`
`= 2011 + 5[300 - 10^2]`
`= 2011 + 5[300 - 100]`
`= 2011 + 5 . 200`
`= 2011 + 1000`
`= 3011`
`h) 695 - [200 + (11 -1)^2]`
`= 695 - [200 + 10^2]`
`= 695 - [200 + 100]`
`= 695 - 300`
`= 395`
`i) 129 - 5[29 - (6-1)^2]`
`= 129 - 5[29 - 5^2]`
`= 129 - 5[29 - 25]`
`= 129 - 5 . 4`
`= 129 - 20`
`= 109`
`j) 2010 - 2000 : [486 - 2(7^2 - 6)]`
`= 2010 - 2000 : [486 - 2(49 - 6)]`
`= 2010 - 2000 : [486 - 2 . 43]`
`= 2010 - 2000 : [486 - 86]`
`= 2010 - 2000 : 400`
`= 2010 - 5`
`= 2005`
$@Thwantobethebest$
Hãy giúp mọi người biết câu trả lời này thế nào?
Bảng tin