45-58+(-45)+(+58)-3=45-58-45+58-3=(45-45)+(58-58)-3=-3

(-57)-(-12)+3-(-57)=-57+12+3+57=(-57+57)+12+3=15

-(-24)-(-30)+(-24)-30+8=24+30-24-30+8=(24-24)+(30-30)+8=8

-(-12)+(+19)-(+12)+8-19=12+19-12+8-19=(12-12)+(19-19)+8=8

47-(-53)+(-47)-(+53)=47+53-47-53=(47-47)+(53-53)=0

-(+28)+32-(-28)+(-34)=-28+32+28-34=(-28+28)-(34-32)=-2

15-(+72)+(-15)+(+72)=15-72-15+72=(15-15)+(72-72)=0

20-(+46)+(-25)-(-46)=20-46-25+46=(20-25)+(46-46)=-5

28-(-32)+(-28)-32+5=28+32-28-32+5=(28-28)+(32-32)+5=5

-75+(-49)+(+75)+49-12=-75-49+75+49-12=(-75+75)+(49-49)-12=-12

\(...=45-58-45+58-3=-3\)

\(...=-57+12+3+57=15\)

\(...=24+30-24-30+8=8\)

\(...=12+19-12+8-19=8\)

\(...=47+53-47-53=0\)

\(...=-28+32+28-34=-2\)

\(...=15-72-15+72=0\)

\(...=20-46-25+46=-5\)

\(=...28+32-28-32+5=5\)

\(...=-75-49+75+49-12=-12\)

(-245) + (-32) + 45 + 132 + (-8)

=(45 - 245) + (132 - 32) - 8

= -200 + 100 - 8

= -108

112 + (-61) + (-95) + (-12) + (-39)

=(112 - 12) - (61 + 39) - 95

= 100 - 100 - 95

= -95

Áo Lai Giai chó nhai dell rách

\(\text{#}Iruma\)

\((12\) giờ \(15\) phút \(+\) \(11\) giờ \(45\) phút\()\) \(+\) \((8\) giờ \(32\) phút \(+\) \(3\) giờ \(28\) phút\()\)

 \(=\)                 \(24\) giờ                       \(+\)         \(12\) giờ 

\(=\)                                             \(36\) giờ 

\(=1\) ngày \(12\) giờ

5+ 5 + 5 + 5+ 5 + 5 +5+ 5 + 5 +5=5x10=50

25 + 25 + 25 + 25 + 25 + 25 +25 + 25=25x8=200

45 + 45 + 45 + 45 + 15 + 15 + 15 + 15=(45x4)+(15x4)=180+60=240

5+ 5 + 5 + 5+ 5 + 5 +5+ 5 + 5 +5
= 5 x 10
= 50

25 + 25 + 25 + 25 + 25 + 25 +25 + 25
= 25 x 8
= 200

45 + 45 + 45 + 45 + 15 + 15 + 15 + 15
= 45 x 4 + 15 x 4
= 180 + 60
= 240

2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18
= (2 + 18) + (4 + 16) + (8 + 12) + (6 + 14) + 10
= 20 + 20 + 20 + 20 + 10 
= 20 x 4 + 10
= 80 + 10
= 90 

125 + 125 + 125 + 125 - 25 - 25 - 25 - 25 
= 4 x (125 - 25) 
= 4 x 100 
= 400
(Tick cho mk pls ^^)

a)524.[23+(-45)] + 524.(-45+123)

=524.(-22) + 524.78

=524.(-22+78)

=524.100

=52400

\(\frac{9}{18}-\frac{-7}{12}+\frac{13}{32}=\frac{143}{96}\)\(;\)\(\frac{5}{-8}+\frac{14}{25}-\frac{6}{10}=\frac{-133}{200}\)

   45 . 25 . 32 . 1,25

= 45 . 25 . (32 . 1,25)

= 45 . 25 . 40

= 45 . (25 . 40)

= 45 . 1000

=45000

45 x 25 x 32 x 1,25 = 45 x 25 x 4 x 8 x 1, 25 = 45 x 100 x 8 x 1,25 = 45 x 8 x 1, 25 x 100 = 45 x 8 x 125 = 45 x 1000 = 45000

=45000 nhé

Hơi nhiều nhưng mn ráng lm nhé tối gủi cũng đc

a, 15/45 + 25/30=7/6

b, 28/32 + 45/27=61/24

c, 4/8 + 8/24=5/6

d, 8/28 + 5/30=19/42

e, 12/10 - 20/50=4/5

f, 8/24 - 5/25=2/15

g, 12/20 - 6/18=4/15

h, 10/12 - 12/36=1/2