150-{102-(14-11)2.20070}
: tí
Câu 1: tính
a) 19.64+36.19
b) 150-[102-(14-11)2.20070
c) 22.3-(110+8):32
d) 59-[90-(17-8)2].14514
e) 72-36:3
nh
a) 19.64+36.19
b) 150-[102-(14-11)2.20070
c) 22.3-(110+8):32
d) 59-[90-(17-8)2].14514
e) 72-36:32
72- 36 : 32=?
150 - [ 102 - ( 14 - 11 )2 . 20070=?
59 - [ 90 - ( 17 - 8 )2 ]=?
có ai giúp me ko
ai mà giúp tui thả tim hết dù đúng hay sai
72 - 36 : 32
= 49 - 36 : 9
= 49 - 4
= 45
150 - [102 - (14 -11)2 . 20070 ]
= 150 - [100 - (14 -11)2. 1]
= 150 - [100 - 32 .1]
= 150 - [100 - 9 .1]
= 150 - 91
= 59
59 - [90 - (17 - 8)2 ]
= 59 - [90 - 92 ]
= 59 - [90 - 81]
= 59 - 9
= 50
Bài có sai sót gì mong bạn thông cảm.
Câu 1: tính
a) 19.64+36.19
b) 150-[102-(14-11)2.20070
c) 22.3-(110+8):32
d) 59-[90-(17-8)2].14514
e) 72-36:32
a) Ta có: \(19\cdot64+36\cdot19\)
\(=19\cdot\left(64+36\right)\)
\(=19\cdot100=1900\)
b) Ta có: \(150-\left[10^2-\left(14-11\right)^2\cdot2700^0\right]\)
\(=150-\left[100-3^2\cdot1\right]\)
\(=150-91\)
\(=69\)
c) Ta có: \(22^3-\left(1^{10}+8\right):3^2\)
\(=22^3-\left(1+8\right):3^2\)
\(=22^3-9:9\)
\(=22^3-1\)
\(=10647\)
d) Ta có: \(59-\left[90-\left(17-8\right)^2\right]\cdot1^{4514}\)
\(=59-\left[90-9^2\right]\cdot1\)
\(=59-\left(90-81\right)\)
\(=59-9=50\)
e) Ta có: \(7^2-36:3^2\)
\(=7^2-36:9\)
\(=49-4=45\)
(\(\frac{3}{7}\)*\(\frac{14}{15}\)+\(\frac{3}{7}\)*\(\frac{1}{15}\))*(15+\(\frac{11}{14}\)-14\(\frac{11}{14}\))
So sánh: C=\(\frac{12}{14^{11}}\) + \(\frac{23}{14^{12}}\) và D= \(\frac{12}{14^{12}}\) + \(\frac{23}{14^{11}}\)
(Làm chi tiết giùm mk nha)
C = (12 x 14) + 23 / 1423 < (13 x 14) + 12
Ta thấy: (12 x 14) + 23 < (13 x 14) + 12
D = 12 + (23 x 14) / 1423
Do:12 + (23 x 14) > (13 x 14) + 12
Nên: D > C
a.11-12+13-14+15-16+17-18+19-20
b.101-102-(-103)-104-(-105)-106-(-107)-108-(-109)-110
Bài làm
a) 11 - 12 + 13 - 14 + 15 - 16 + 17 - 18 + 19 - 20
= ( 11 - 12 ) + ( 13 - 14 ) + ( 15 - 16 ) + ( 17 - 18 ) + ( 19 - 20 )
= ( -1 ) + ( -1 ) + ( -1 ) + ( -1 ) + ( -1 )
= -5
b) 101 - 102 - ( - 103 ) - 104 - ( - 105 ) - 106 - ( - 107 ) - 108 - ( - 109 ) - 110
= 101 - 102 + 103 - 104 + 105 - 106 + 107 - 108 + 109 - 110
= ( 101 - 102 ) + ( 103 - 104 ) + ( 105 - 106 ) + ( 107 - 108 ) + ( 109 - 110 )
= ( -1 ) + ( -1 ) + ( -1 ) + ( -1 ) + ( -1 )
= -5
# Học tốt #
a)11 - 12 + 13 - 14 + 15 - 16 + 17 - 18 + 19 - 20
= (11 - 12) + (13 - 14) + (15 - 16) + (17 - 18) + ( 19 - 20)
= (-1) + (-1) + (-1) + (-1) + (-1) = (-1) . 5 = - 5
b)101-102-(-103)-104-(-105)-106-(-107)-108-(-109)-110
= 101-102+103-104+105-106+107-108+109-110
= (101-102)+(103-104)+(105-106)+(107-108)+(109-110)
= (-1) + (-1) + (-1) + (-1) + (-1)
= (-1) . 5
= -5
so sánh hai phân số
a) \(\frac{102}{97}\) và \(\frac{99}{101}\)
b) \(\frac{-5}{14}\) và \(\frac{-4}{11}\)
c) \(M=\frac{101^{102}+1}{101^{103}+1}\) và \(N=\frac{101^{103}+1}{101^{104}+1}\)
rút gọn phân số
a) \(\frac{15.8+15.4}{12.3}\)
b) \(G=\frac{\frac{3}{41}-\frac{12}{47}+\frac{27}{53}}{\frac{4}{41}-\frac{16}{47}+\frac{36}{53}}\)
a)Tu so:
15.8+15.4
=5.3.2.4+5.3.4
=12.10+12.5
=12.15
=>\(\frac{12.15}{12.3}=\frac{12}{12}.\frac{15}{3}=\frac{15}{3}=5\)
b) G=3/41-12/47+27/53//4/41-16/47+36/53
=18/47// 24/47
= 18/47 . 47/24
= 18/24
= 3/4
xin loi ban vi may minh ko go dc phan so. du sao cung chuc ban hoc tot!
1. Cho A=1/101+1/102+1/103+...+1/150
Chứng minh rằng A > 11/30
Tinh:
a, 11-12+13-14+15-16+17-18+19-20
b, 101-102-(-103)-104-(-105)-106-(-107)-108-(-109)-110
a,11-12+13-14+15-16+17-18+19-20
=(11-12)+(13-14)+(15-16)+(17-18)+(19-20)
=(-1)+(-1)+(-1)+(-1)+(-1)
=-5
b,101-102-(-103)-104-(-105)-106-(-107)-108-(-109)-110
=101-102+103-104+105-106+107-108+109-110
=(101-102)+(103-104)+(105-106)+(107-108)+(109-110)
=(-1)+(-1)+(-1)+(-1)+(-1)
=-5