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Trả lời:
(-65)-(-37)
= (-65)+37
=-28
(-159)-280:(-7)
=(-159)-(-40)
=(-159)+40
=-119
(-12).\(3^2\)+240:\(\left(-2\right)^2\)
=-108+60
=-48
\(5.\left(-2\right)^3-36:3^2\)
=\(-40-4\)
=\(-44\)
\(128-\left[68+8.\left(35-37\right)^2\right]:\left(-4\right)\)
=\(128-\left[68+8.4\right]:\left(-4\right)\)
=\(128-\left[68+32\right]:\left(-4\right)\)
=\(128-100:\left(-4\right)\)
=\(128-\left(-25\right)\)
=\(153\)
\(-141+3^3+\left(-2\right)^2\)
=\(-141+9+4\)
=\(-132+4\)
=\(-128\)
chúc bạN HOK TỐT
1)(-65)-(-37)=-28
2)(-159)-280:(-7)
=(-159)-(-40)
=-119
3)(-12).3\(^2\)+240:(-2)\(^{^2}\)
=-108+60
=-48
4)5.(-2)\(^3\)-36:3\(^2\)
=-40-4
=-44
5) 128-[68+8.(35-37)2]:(-4)
=128-[68+8.-2\(^2\)]:(-4)
=128-[68+32]:(-4)
=128-100:(-4)
=128-(-25)
=153
6)-141+3\(^3\)+(-2)\(^2\)
=-114+4
=-110
\(\left(-65\right)-\left(-37\right)=\left(-65\right)+37=-\left(65-37\right)=-28\)
\(\left(-159\right)-280\div\left(-7\right)=\left(-159\right)-\left(-40\right)=-119\)
\(\left(-12\right).3^2+240\div\left(-2\right)^2=\left(-12\right).9+240\div4=\left(-108\right)+60=-48\)
\(5.\left(-2\right)^3-36\div3^2=5.\left(-8\right)-36\div9=\left(-40\right)-4=-44\)
\(128-\left[68+8.\left(35-37\right)^2\right]\div\left(-4\right)=128-\left[69+8\left(-2\right)^2\right]\div4\)
\(=128-\left(69+8.4\right)\div4=128-101\div4=128-25,25=102,75\)
\(\left(-141\right)+3^3+\left(-2\right)^2=\left(-141\right)+27+4=\left(-141\right)+31=-110\)
\(\left(-123\right)-\left[200-4\left(35-40\right)^2\right]\left(-5\right)^2=\left(-123\right)-\left[200-4\left(-5^2\right)\right].25\)
\(=\left(-123\right)-\left(200-4.25\right).25=\left(-123\right)-100.25=\left(-123\right)-2500=-2626\)
\(\left(-141\right)+4^3+\left(-2\right)^3.11=\left(-141\right)+64+\left(-8\right).11=-165\)
\(\left(-212\right)-11-300\div\left[2^2.\left(-5\right)^2\right]-\left(-126\right)\) P/s : Dài thế!
\(=\left(-223\right)-300\div\left(4.25\right)+126=\left(-223\right)-300\div100+126\)
\(=\left(-223\right)-3+126=\left(-226\right)+126=-\left(226-126\right)=-100\)
\(\left(5-x\right).3^9=3^{10}\Leftrightarrow5-x=3^{10}\div3^9=3^1=3\Rightarrow x=5-3=2\)
\(\left(21-x\right)+35=17\Leftrightarrow21-x=17-35=-18\Leftrightarrow x=21-\left(-18\right)=39\)
\(6x+15=-105\Leftrightarrow6x=\left(-105\right)+15=-90\Leftrightarrow x=-90\div6=-15\)
a) = - 15.9+5 = -45 + 5 = - 40
b) -31.9 +31. 2,5=31. (-9 + 2,5) = 31 . ( - 6,5) =-201,5
c) 5. (-27) - 36 : 36 = -135 -1=-136
d) = -147 - [68+8.4]:25 =-147 -100: 25 = -147 - 4 = -151
e) -141 +64+(-8)=-77 + ( -8) = -85
g) -20 - 11 - 500:[4.25]+76 =-31- 500: 100 +76 = -31 -5 +76 = - 36 + 76 = 40
1) ( -15 ) . (-3 )2 - 250 : ( -50 )
=( -15 ) . 9 - 250 : ( -50 )
= -135 - ( -5 )
= -130
2) ( -31 ) .32 + 310 : (-2 )2
= (-31). 9+ 310: 4
= 279+ 77, 5
= 365,5
(-12).32+240:(-2)2=(-12).9+240:4=(-108)+60= -48
( - 117 ) - 141 - 119
= (-258) - 119
= -377
( - 152 ) - ( - 83 ) + 35
= (-152) + 83 + 35
= (-69) + 35
= -34
( - 45 ) : ( - 3 ) 2- 21 . ( - 5 )
= (-45) : 9 - 21 . (-5)
= (-5) - (-105)
= (-5) + 105
= 100
( - 35 ) . 2 2 + 60 : ( - 2 ) 2
= (-35) . 4 + 60 : 4
= (-140) + 15
= -125
12 . ( - 2 ) 3- 72 : ( - 6 ) 2
= 12 . (-8) - 72 : 36
= (-96) - 2
= -98
#HOK TỐT #
( - 117 ) - 141 - 119
=(-117-119)-141
=-236-141
=-377
( - 152 ) - ( - 83 ) + 35
=-69+35
=-34
( - 45 ) : ( - 3 ) 2- 21 . ( - 5 )
=-45:9-21.(-5)
=-5-(-105)
=-5+105
=100
( - 35 ) . 2 2 + 60 : ( - 2 ) 2
=(-35).4+60:4
=-140+15
=-125
12 . ( - 2 ) 3- 72 : ( - 6 ) 2
=12.(-8)-72:36
=-96-2
=-98