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a) {132 - [116- (16 - 8)]:2}.5
= [132 - (116 - 8): 2] .5
= (132 - 108 : 2). 54
= (132 - 54).5
= 78.5 = 390
b) 36: {136 : 200 - (12+ 8. 20)]}
= 36: {336 : [200 - ( 12 + 160)]}
= 36 : [336 : ( 200 - 172)
= 36 : ( 336 : 28) = 3
c) 86 - [15. (64 - 39): 75+11]
= 86 - (15.25 : 75 + 11)
= 86 - ( 5 + 11)
= 70
d) 55 - [ 49 - ( 2 3 . 17 - 2 3 . 14 ) ]
= 55 - 49 - 2 3 . 3
= 55- ( 49 - 24)
= 30
a) {132 – [116 – (16 – 8)]:2}.5
= [132 – (116 – 8): 2] .5
= (132 – 108 : 2). 5
= (132 –54).5
= 78.5 = 390
b) 36: {136 : 200 – (12+ 8. 20)]}
= 36: {336 : [200 – ( 12 + 160)]}
= 36 : [336 : ( 200 – 172)
= 36 : ( 336 : 28)
= 36 : 12 = 3
c) 86 – [15. (64 - 39): 75+11]
= 86 – (15.25 : 75 + 11)
= 86 – ( 5 + 11)
= 70.
d) 55 – [49 – (23 . 17 – 23.14)]
= 55 – (49 – 23 .3)
= 55 – ( 49 – 24)
= 30
a) 6857 + 3444 : 28
=6857 + 123
=6980
b) 80 - [ 130 - ( 75 - 11 ) ]
=80 - [ 130 - 64 ]
=80 - 66
=14
c) 100 : { 2 x [ 52 - ( 35 - 8 ) ]}
=100 : { 2 x [ 52 - 27 ]}
=100 : { 2 x 25 }
=100 : 50
=2
d) 12 : { 390 : [ 500 - ( 125 + 35 + 7 x 30 ) ] }
=12 : { 390 : [ 500 - ( 125 + 35 + 210 ) ] }
=12 : { 390 : [ 500 - 370 ] }
=12 : { 390 : 130 }
=12 : 3
=4
a) 6857 + 3444 : 28
=6857 + 123
=6980
b) 80 - [ 130 - ( 75 - 11 ) ]
=80 - [ 130 - 64 ]
=80 - 66
=14
c) 100 : { 2 x [ 52 - ( 35 - 8 ) ]}
=100 : { 2 x [ 52 - 27 ]}
=100 : { 2 x 25 }
=100 : 50
=2
d) 12 : { 390 : [ 500 - ( 125 + 35 + 7 x 30 ) ] }
=12 : { 390 : [ 500 - ( 125 + 35 + 210 ) ] }
=12 : { 390 : [ 500 - 370 ] }
=12 : { 390 : 130 }
=12 : 3
=4
Answer:
Bài 1:
\(\left(135-35\right).\left(-37\right)+37.\left(-42-58\right)\)
\(=100.\left(-37\right)+37.\left(-100\right)\)
\(=\left(-3700\right)+\left(-3700\right)\)
\(=-7400\)
\(-65.\left(87-17\right)-87.\left(17-65\right)\)
\(=\left(-65\right).87-\left(-65\right).17-87.17+87.65\)
\(=-\left(-65\right).17-87.17\)
\(=17.\left(65-87\right)\)
\(=-374\)
\([3.\left(-2\right)-\left(-8\right)].\left(-7\right)-\left(-2\right).\left(-5\right)\)
\(=[\left(-6\right)+8].\left(-7\right)-\left(-2\right).\left(-5\right)\)
\(=2.\left(-7\right)-10\)
\(=-24\)
Bài 2:
\(\left(-55\right).\left(-25\right).\left(-8\right)\)
\(=\left(-55\right).[\left(-25\right).\left(-8\right)]\)
\(=\left(-55\right).200\)
\(=-11000\)
\(\left(-1\right).\left(-2\right).\left(-3\right).\left(-4\right).\left(-5\right).10\)
\(=[\left(-1\right).10].[\left(-2\right).\left(-5\right)].[\left(-3\right).\left(-4\right)]\)
\(=\left(-10\right).10.12\)
\(=-1200\)
\(A=\frac{2^{10}.13+2^{10}.65}{2^8.104}=\frac{2^{10}.\left(13+65\right)}{2^8.104}=\frac{2^{10}.78}{2^8.104}=3\)
\(A=\frac{2^{10}.13+2^{10}.65}{2^8.104}=\frac{2^{10}\left(13+65\right)}{2^8.104}=\frac{2^{10}.78}{2^8.104}=\frac{2^2.78}{104}=\frac{2^2.2.39}{2^3.13}=\frac{2^3.39}{2^3.13}=3\)
a) số các số: (65-2) : 3 +1=22
tổng: (65+2) x 22 : 2= 737
b, c , d làm tương tự nhé
`a)35+51+65+49`
`=(35+65)+(51+49)`
`=100+100`
`=200`
`b)(205+196)+104`
`=205+(196+104)`
`=205+200`
`=405`
Tính nhanh các giá trị biểu thức sau
a) 35 + 51 + 65 + 49
= (35 + 65) + (51 + 49)
= 100 + 100
= 200
b) (205 + 196) + 104
= 401 + 104
= 505.