[130-3(5.24-52.2)]:23
a) 52.2 – 32.4 b) 58.75 + 58.50 – 58.25
c) 107 – {38 + [7.32 – 24 : 6 + (9 – 7)3]}:15 d) (-23) + 13 + ( - 17) + 57
a) 52.2 – 32.4 b) 58.75 + 58.50 – 58.25
c) 107 – {38 + [7.32 – 24 : 6 + (9 – 7)3]}:15 d) (-23) + 13 + ( - 17) + 57
a) 52.2 – 32.4 b) 58.75 + 58.50 – 58.25
c) 107 – {38 + [7.32 – 24 : 6 + (9 – 7)3]}:15 d) (-23) + 13 + ( - 17) + 57
Câu 13: (2 đ)Thực hiện tính:
a) 52.2 – 32.4 b) 58.75 + 58.50 – 58.25
c) 107 – {38 + [7.32 – 24 : 6 + (9 – 7)3]}:15 d) (-23) + 13 + ( - 17) + 57
a) 52 . 2 - 32 . 4 b) 58 . 75 + 58. 50 - 58 . 25
= 25 . 2 - 9 . 4 = 58 . ( 75 + 50 - 25 )
= 50 - 36 = 58 . 100
= 14 = 5800
a) 52 . 2 - 32 . 4 b) 58 . 75 + 58. 50 - 58 . 25
= 25 . 2 - 9 . 4 = 58 . ( 75 + 50 - 25 )
= 50 - 36 = 58 . 100
= 14 = 5800
c) 107 - { 38 + [ 7 . 32 - 24 : 6 + ( 9 - 7 )3]} : 15
= 107 - { 38 + [ 7. 9 - 4 + 23]} : 15
= 107 - { 38 + [ 63 - 4 + 8]} : 15
= 107 - { 38 + [ 59 + 8]} : 15
= 107 - { 38 + 67 ]} : 15
= 107 - 105 : 15
= 107 - 7
= 100
a) 23 – 53 : 52 + 12.22 | b) 5[(85 – 35 : 7) : 8 + 90] – 50 |
c) 2.[(7 – 33 : 32) : 22 + 99] – 100 | d) 27 : 22 + 54 : 53 . 24 – 3.25 |
e) (35 . 37) : 310 + 5.24 – 73 : 7 | f) 32.[(52 – 3) : 11] – 24 + 2.103 |
g) (72005 + 72004) : 72004 | h) (57 + 75).(68 + 86).(24 – 42) |
i) (75 + 79).(54 + 56).(33.3 – 92) | j) [(52.23) – 72.2) : 2].6 – 7.25 |
a: \(2^3-5^3:5^2+12\cdot2^2\)
\(=8-5+48\)
\(=51\)
b: \(5\cdot\left[\left(85-35:7\right):8+90\right]-5\)
\(=5\cdot\left[10+90\right]-5\)
=495
Điền vào ô vuông các dấu thích hợp (=; <; >):
a) 2 3 . 5 + 3 4 . 2 - 4 . ( 5 7 : 5 5 ) □ 15 : ( 3 5 : 3 4 ) + 5 . 2 4 - 7 2 - 4 ;
b) ( 3 5 . 3 7 ) : 3 1 0 + 5 . 2 4 □ 5 . 2 2 . 2 3 - 4 . ( 5 8 : 5 6 ) ;
c) 2 [ ( 7 - 3 3 : 3 2 ) : 2 2 + 99 ] - 100 □ 3 4 . 2 + 2 3 . 5 - 7 ( 5 2 - 5 ) ;
d) 207 : { 2 ^ 3 . [ ( 156 - 128 ) : 14 ] + 7 ] □ 117 : { [ 79 - 3 ( 3 ^ 3 - 17 ) ] : 7 + 2 }
giúp tôi với:
-3/5+28.43/5.56+28.5/5.24-28.21/5.63
Tinhs pheps tinhs sau :
B = \(-\dfrac{3}{5}+\dfrac{28.43}{5.56}+\dfrac{28.5}{5.24}-\dfrac{28.21}{5.63}\)
\(\dfrac{-3}{5}+\dfrac{43}{10}+\dfrac{7}{6}-\dfrac{28}{15}\)
\(=3\)
rút gọn
a,\(\dfrac{-63}{72}\)
b,\(\dfrac{20}{-140}\)
c,\(\dfrac{3.10}{5.24}\)
d,\(\dfrac{6.5-.6.2}{6+3}\)
a) `(-63)/72 = (-63:9)/(72:9)=(-7)/8`
b) `20/(-140) = (20:20)/(-140:20) = 1/(-7)=(-1)/7`
c) `(3.10)/(5.24) =(3.2.5)/(5.2 .3.4)=1/4`
d) `(6.5-6.2)/(6+3)=18/9=2`
100........5.24
a) 2^4.5-[131-(13-4)^2]
b)-3/5+28.43/5.56+28.5/5.24-28.21/5.63