43x37+93x43+57x61+69x57=13000

1300

ai bấm sai thì cứ bấm 

nhưng mình đúng thì vẫn là thật

ok bn hiền

\(a,\left(13+150+47\right)-\left(13+47\right)\)

\(=13+150+47-13-47\)

\(=\left[13+\left(-13\right)\right]+\left[47+\left(-47\right)\right]+150\)

\(=0+0+150\)

\(=150\)

\(b,\left(-237\right)-\left[\left(-237+155\right)-55\right]\)

\(=\left(-237\right)+237+155-55\)

\(=0+100\)

\(=100\)

\(c,57.\left(62-43\right)-62.\left(57-43\right)\)

\(=57.62-57.43-62.57+62.43\)

\(=-57.43+62.43\)

\(=43.\left(-57+62\right)\)

\(=43.5\)

\(=215\)

a , ( 13 + 150 + 47 ) - ( 13 + 47 )

= 12 + 150 + 47 - 13 - 47

= [ 12 + ( - 13 ) ] + [ 47 + ( - 47 ) ] + 150

= - 1 + 0 + 150

= 149

b , ( - 237 ) - [ ( - 237 + 155 ) - 55 ]

= - 237 - [ - 237 + 155 - 55 ]

= - 237 + 237 - 155 + 55

= [ ( - 237 ) + 237 ] + [ ( - 155 ) + 55 ]

= 0 +  ( - 100 )

= - 100

c , 57 . ( 62 - 43 ) - 62 . ( 57 - 43 )

= 57 . 62 - 57 . 43 - 62 . 57 - 62 . 43

= [ 57 . 62 - 62 . 57 ] . [ 62 . 43 - 62 . 43 ]

= 0 . 0 

= 0

a)=(13+47+150)-(13+47)

=(60+150)-60

=210-60

=150

b)=(-237)-(237-155)+55

=(-237)-237+155+55

=(-237)+237-155-55

=0-100

=-100

a) \(3\cdot4\cdot25\cdot8\cdot125\)

\(=\left(125\cdot8\right)\cdot\left(4\cdot25\right)\cdot3\)

\(=1000\cdot100\cdot3\)

\(=300000\)

b) \(36\cdot63+64\cdot663\)

\(=63\cdot\left(36+64\right)\)

\(=63\cdot100\)

\(=6300\)

c) \(45\cdot129+71\cdot129\)

\(=129\cdot\left(129+71\right)\)

\(=129\cdot200\)

\(=25800\)

d) \(26\cdot\left(43+57\right)+74\cdot\left(43+57\right)\)

\(=26\cdot100+74\cdot100\)

\(=2600+7400\)

\(=10100\)

a) 3.4.25.8.125

=3(4.25).(8.125)

=3.100.1000

300000

b) 36.63+ 64.63

=(36+64).63

=100.63

=6300
c) 45.129+ 71.45 

=45.(129+71)

=45.200

=9000              

d) 26. (43+ 57)+ 74(57 +43)

=26.43+26.57 + 74.57 + 74.43

=(26.43+74.43)+(26.57 + 74.57 )

= [43.(26+74)]+[ (26+74).57]

=[43.100]+[100.57]

=4300+5700

= 10000

     43 x 27 + 93 x 43 + 57 x 61 + 59 x 57 

  = 43 x ( 27 + 93 ) + 57 x ( 61 + 59 )

  =  43 x 120 +  57 x 120

  = 120 x ( 43 + 57 )

   = 120 x 100

  = 1200

b) 64 x 6 + 81 x 4 + 17 x 6 

 = 6 x ( 64 + 17 ) + 81 x 4 

 =  6 x 81 + 81 x 4 

 = 81 x ( 6 + 4 ) 

 = 81 x 10 

 = 810

A) =43 x (27+93)+57*(61+59)

=43*120+57*120

=120*(43+57)

=120*100

=12000

a, 119 + 24 + 81

= ( 119 + 81 ) + 24

= 200 + 24

= 224

b, 16 . 6 . 125

= 16 . 125 . 6

= 2000 . 6

= 12000

c, 25 . 104

= 25 . 100 + 25 . 4

= 2500 + 100

= 2600

d, 12 . 19 + 12 

= 12 . 19 + 12 . 1

= 12 . ( 19 + 1 )

= 12 x 20 

= 240

e, 43 . 27 + 93 . 43 + 57 . 61 + 59 . 57

= 43 . ( 27 + 93 ) + ( 61 + 59 ) . 57

= 43 . 120 + 120 . 57

= 120 . 43 + 120 . 57

= 120 . ( 43 + 57 )

= 120 . 100

= 12000

a/ 199 + 24 + 81 

= (119+81) + 24

= 200 + 24

= 224

b/ 16 . 6 . 125

= ( 16 . 125) . 6

= 2000 . 6

= 12000

c/ 25 . 104

= 25 . ( 100 + 4 )

= 25 . 100 + 25 . 4

= 2500 + 100

= 2600

d/43 . 27 + 93 . 43 + 57 . 61 + 59 . 57

= 43 . ( 27 + 93) + 57 . ( 61+ 59)

= 43 . 130 + 57 . 130

= (43 + 57) . 130

= 100 . 130

= 1300

(43 – 863) – (137 – 57)

= 43 – 863 – 137 + 57

= (43 + 57) – (863 + 137)

= 100 – 1000

= –900

=184

=184

(-18)+ 43 + 118 + 57 + (-16)=[(-18)+118]+ (43 +57)  + (-16)

=100+100+(-16)

=200+(-16)

=184

\(43\times7+93\times43+57\times61+69\times57\)

\(=43\times\left(7+43\right)+57\times\left(61+69\right)\)

\(=43\times50+57\times130\)

\(=2150+7410\)

\(=9560\)

\(9560\)

a; -2001+(1999+2001)=-2001+1999+2001=1999

b;(43-863)-(137-57)=43-863-137+57=(43+57)-(863+137)=100-1000=-900

hok tốt

Bài làm

a) -2001 + ( 1999 + 2001 )                                                                b) ( 43 - 863 ) - ( 137 - 57 )

= -2001 + 1999 + 2001                                                                        = -820 - 80

= [( -2001 + 2001 )] + 1999                                                                  = -820 + ( -80 )

= 0 + 1999                                                                                            = -900

= 1999

# Chúc bạn học tốt #

a ) - 2001 + ( 1999 + 2001 )

= - 2001 + 1999 + 2001

= ( - 2001 + 2001 ) + 1999

= 0 + 1999

= 1999

b)

( 43 - 863 ) - ( 137 - 57 )

= 43 - 863 - 137 + 57

= ( 43 + 57 )  + ( - 863 - 137 )

= 100 + ( - 1000 )

= - 900