A =-5.13:(145/28 -17/9 -1.25 +79/63) = ?
Tình:
a, -5,13 : ( 145/28 - 17/9 . 5/4 + 79/63 )
a)\(-\frac{5}{13}:\left(\frac{145}{28}-\frac{17}{9}.\frac{5}{4}+\frac{79}{63}\right)\)
\(=-\frac{5}{13}:\left(\frac{145}{28}-\frac{85}{36}+\frac{79}{63}\right)\)
\(=-\frac{5}{13}:\left(\frac{145}{28}-\frac{31}{28}\right)\)
\(=-\frac{5}{13}:\frac{57}{14}\)
\(=-\frac{70}{741}\)
Tính giá trị của các biểu thức : A= -5,13 :( \(\frac{145}{28}-\frac{17}{9}.1,25+\frac{79}{63}\))
A = \(-\frac{513}{100}:\left(\frac{145}{4.7}-\frac{17}{9}.\frac{5}{4}+\frac{79}{7.9}\right)=-\frac{513}{100}:\frac{145.9-17.5.7+79.4}{4.7.9}=-\frac{513}{100}:\frac{57}{14}\)
A = \(-\frac{513}{100}.\frac{14}{57}=\frac{-63}{50}\)
Tính:
\(\frac{145}{28}-\frac{85}{36}+\frac{79}{63}\)
\(B=\left(0,645:0,3-1\frac{17}{150}\right):\left(46,25-\frac{1}{5}+\frac{1}{5}+\frac{1}{7}\cdot1,96\right)-11.125\)
\(C=11,26-5.13:\left(5\frac{5}{28}-1\frac{8}{9}\cdot1,5+1\frac{16}{63}\right)\)
1, Thực hiện phép tính :
A = 15/34 + 7/21 + 9/34 - 32/17 + 2/3
B = 114/7 : ( - 3/5) - 198/7 : (-3/5)
C = 25 . ( -1/3 ) + 1/5 - 2.(-1/2)^2 - 1/2
D = ( -2)^3 . ( 3/4 - 0,25 ) : ( 9/4 - 7/6 )
E = 5√16 - 4√9 + √25 - 0,3 √400
F = (-3/2)^2 + | -5/6 | - 1/4 : 6
I = -1,53 : ( 145/28 - 17/9 . 1,25 + 79/63)
K = ( 10/3 . 1,9 + 9,5 : 13/3 ) . ( 62/75 - 4/25 )
Giúp mình nha , mình đang cần gấp !
1, Thực hiện phép tính :
A = 15/34 + 7/21 + 9/34 - 32/17 + 2/3
B = 114/7 : ( - 3/5) - 198/7 : (-3/5)
C = 25 . ( -1/3 ) + 1/5 - 2.(-1/2)^2 - 1/2
D = ( -2)^3 . ( 3/4 - 0,25 ) : ( 9/4 - 7/6 )
E = 5√16 - 4√9 + √25 - 0,3 √400
F = (-3/2)^2 + | -5/6 | - 1/4 : 6
I = -1,53 : ( 145/28 - 17/9 . 1,25 + 79/63)
K = ( 10/3 . 1,9 + 9,5 : 13/3 ) . ( 62/75 - 4/25 )
Giúp mình nha , mình đang cần gấp !
1 . Tính hợp lí
a) (-37)+14+26+37
b) (-24)+6+10+24
c) 15+23+9-25)+(-33)
d) 60+33+(-50)+(-33)
e) (-16)+(-209)+(-14)+209
g) (-12)+(-13)+36+(-11)
h) -16+24+16-34
r) 25+37-48-25-37
u) 2575+37-2576-29
i) 34+35+36+37-14-15-16-17
2 . Bỏ ngoặc rồi tính
a)-7264+(1543+7264)
b) (144-97)-144
c) (-145)-(18-145)
d) 11+(-11+27)
e) (27+514)-(486-73)
g) (36+79)+(145-79-66)
h) 10-[12-(-9-1)
r) (-28-29+43)-(43+38)
u ) 271 - [(-43)+271-(-17)]
i ) -144-[29-(+144)-(+144)
a) (-37)+14+26+37 = ( -37 + 37) + ( 14 + 26) = 40
b) (-24)+6+10+24 = ( - 24 + 24) + ( 6 + 10) = 16
c) 15+23+9-25)+(-33) = (15 - 25) + ( 23 - 33) + 9
= - 10 - 10 + 9
= - 11
d) 60+33+(-50)+(-33) = ( 60 -50) + ( 33 - 33)
= 10
e) (-16)+(-209)+(-14)+209 = ( - 16 - 14) + ( - 209 + 209)
= - 30
g) (-12)+(-13)+36+(-11)= ( - 11 -12 - 13 ) + 36
= - 36 + 36 = 0
h) -16+24+16-34 = ( - 16 + 16)+(24 - 34) = - 10
r) 25+37-48-25-37 = (25 - 25)+(37 - 37) - 48 = - 48
u) 2575+37-2576-29 = ( 2575 - 2576) + ( 37 - 29)
= - 1 + 8 = 7
i) 34+35+36+37-14-15-16-17 = ( 34 - 14 )+(35 - 15)+(36-16)+ (37 - 17)
= 80
2 . Bỏ ngoặc rồi tính
a)-7264+(1543+7264) = - 7264 + 1543 + 7264
= 1543
b) (144-97)-144 = 144 - 97 - 144 = - 97
c) (-145)-(18-145) = - 145 - 18 + 145 = - 18
d) 11+(-11+27) = 11 - 11 + 27 = 27
e) (27+514)-(486-73) = 27 + 514 - 486 + 73
= 128
g) (36+79)+(145-79-66) = 36 + 79 + 145 - 79 - 66
= 115
h) 10-[12-(-9-1) = 10 - ( 12 + 9 + 1)
= 10 - 22
= - 12
r) (-28-29+43)-(43+38) = - 28 - 29 + 43 - 43 - 38
= - 95
u ) 271 - [(-43)+271-(-17)] = 271 + 43 - 271 - 17 = 26
i ) -144-[29-(+144)-(+144) = - 144 - 29 - 144 + 144 = -173
1/-7264+ (1543 +7264)
2/ (14497) - 144
3/ (-145) (18 145)
4/ 111 + (-11+27)
5/ (27 +514) - (486-73)
6/ (36+79) + (145-79-36)
7/10 [12-(-9-1)]
8/ (3829 +43) - (43 +38)
9/ 271 [(-43) + 271 − (-17)]
10/-144-[29(+144)-(+144)]
1; - 7264 + (1543 + 7264)
= - 7264 + 1543 + 7264
= (-7264 + 7264) + 1543
= 0 + 1543
= 1543
2; (14497) - 144
= 14497 - 144
= 14353
3; (-145).(18145)
= -145.18145
= -2631025
4; 111 + (-11 + 27)
= 111 + 16
= 127
5; (27 + 514) - (486 - 73)
= 27 + 514 - 486 + 73
= (27 + 73) + (514 - 486)
= 30 + 28
= 58
6; (36 + 79) + (145 - 79 - 36)
= 36 + 79 + 145 - 79 - 36
= (36 - 36) + (79 - 79) + 145
= 0 + 0 + 145
= 145
A=-5,13:(154/28- 17/9 * 1,25+79/36)
\(=-5.13:\dfrac{16}{3}=-\dfrac{513}{100}\cdot\dfrac{3}{16}=\dfrac{-1539}{1600}\)