129 - 5 [ 29 ( 6 -12 ) ]
129-5[29-(6-1) mũ 2]
129 -5[29-(6-1) ^2]
=129 - 5[29- 5^2]
= 129 -5[ 29-25]
=129 - 5 × 4
=129 - 20
=109
Ta có: \(129-5\left[29-\left(6-1\right)^2\right]\)
\(=129-5\left[29-5^2\right]\)
\(=129-5\cdot4\)
=109
129 - 5 [ 29 - \(\left(6-1\right)^2\) ]
= 129 - 5 [ 29 - \(5^2\) ]
= 129 - 5 [ 29 - 25 ]
= 129 - 5 . 4
= 129 - 20
= 109
Chúc bạn học tốt nhé !
5 – ( 12 – x ) = 129 – ( 6 + 129 )
Help
5 - ( 12 - x ) = 129 - ( 6 + 129 )
5 - 12 + x = 129 - 6 - 129
( -7 ) + x = ( -6)
x = ( - 6 ) + 7
x = 1
Vậy x = 1
5-(12-x)=129-(6+129)
5-(12-x)=129-135
5-(12-x)=-6
12-x =5-(-6)
12-x=11
x=12-11
x=1
5 – ( 12 – x ) = 129 – ( 6 + 129 )
5-(12-x)=129-135
5-(12-x)=-6
(12-x)=5-(-6)
12-x=11
x=12-11
x=1
vay x=1
a) 2011 + 5[300 – (17 – 7)2]
b) 695 – [200 + (11 – 1)2]
c) 129 – 5[29 – (6 – 1)2]
2010 – 2000 : [486 – 2(72 – 6)]
a: \(=2011+5\cdot\left[300-10^2\right]\)
\(=2011+5\cdot200\)
=1011
b: \(=695-\left[200+10^2\right]\)
=695-300
=395
a) =2011+5.200
=3011
b)=695-300
=395
c)1=29-5.4
=109
d)=2010-2000:400
=2010-5
=2005
1. tính nhanh:
a. 129-5.[29-\(\left(6-1\right)^2\) ]
129-5[29-(6-1)2]
=129-5(29-52)
=129-5(29-25)
=129-5.4
=129-20
=109
129-5[29-(6-1)2] =129-5[29-42]
= 129-5[29-16]
= 129-5.13
= 129-65
= 64
nha
\(a=129-5.\left[29-5^{2^{ }}\right]\)
a = 129-5.[29-25]
a = 129-5.4
a = 129-20
a= 109
Bạn nào giỏi giải hộ mình bài này với ạ :3
a) (- 20) – ( - 5) b) (- 28) : (- 4) c) (-7). (-5) + (-12) : 3 d) (-129) – 37 – (-29) + (-63) e) (217 – 315) – (117 – 215) |
f) (26 - 17) : (-3) + (35 – 11): 2 g) (-5). (11 – 18) – 3. (25 – 11) h) (-15). (-129) + (-15). 29 i) 13. (-125) – 13. (-25) k) 37. (- 135) + (-37). (-35) |
Mình cảm ơn ạ <333
a. -20+5=-15
b. 7
c. 35 + (-4)= 31
d. -129-37+29-63= -100-100 = -200
e. 217 -315-117+215 =100-100=0
f. 15:(-3)+24:2 = -5 + 12 = 7
g. (-5).(-7)-3.(14)= 35 - 42 = -7
H. (-15)x(-129+29) = -15 x -100 =1500
i. 13 x (-125+25) =13 x -100 = -1300
k. 37(-135+35) = 37 x -100 = -3700
Tính nhanh :
8/15 + 5/12 - 7/15 - 1/12
9/5 : 7/6 + 3/2 : 7/6 -8/5 x 6/7
0.987 x 3.4 + 0.987 + 5.6 x 0.987
1) Tính
a) 10-(-7)+36-(-106)
b) 129-5.{29-(6-1)^2}
c) 42-(-50) + (-42) - 120
d) 1560:Ơ5.79-(125+5.49)+5.21
1) Tính
a) 10-(-7)+36-(-106)
= 10 + 7 + 36 + 106
= 17 + 36 + 106
= 53 + 106
= 159
b) 129 - 5. {29-(6-1)2 }
= 129 - 5. { 29 - 52 }
= 129 - 5. { 29 - 25 }
= 129 - 5. 4
= 129 - 20
= 109
c) 42-(-50) + (-42) - 120
= 42+ (-42) - ( 120 - 50 )
= 0 - 70
= - 70
a, 10 -(-7)+36-(-106)=10 +7+36+106=17+142=159
b,129-5.(29-(6-1)^2)=129-5.(29-5^2)=129-5.(29-10)=124.19=2356
Đúng / Sai
59+64=36+64+59 ..............
129+157-29=129-29+157 ............
129+157-29 = 157+ 129-29 ...........
4+16 x 25 = 16 + 4 x 25 .............
21 + 49 : 7 = 49 + 21 : .................
(36 + 45 ) : 9 = (45+36 ) :9 .............
59 + 64 = 36 + 63 + 59 _Sai_
129 + 157 - 29 =129 - 29 + 157 _Đúng_
129 + 157 - 29 = 157 + 129 - 29 _Đúng_
4 +16 x 25 = 16 + 4 x 25 _Sai_
21 + 49 : 7 = 49 + 21 : 7 _Sai_
(36 + 45 ) : 9 = (45+36 ) : 9 _Đúng_
(Cái này tính nhẩm là ra thôi bạn ạ! Đúng cho mình 1 tick nhé bạn!)
tính 1 cách hợp lí
a. - ( -129 ) + ( -119 ) - 301 + 12
b. 39 . ( 29 - 17 ) - 29 . ( 39 - 17 )
c. 115 . ( -46 ) + 15 . 46
d. -49 . 42 + 21 . ( -102 )