a) 37.75+37.45+63.67+63.53

= 37.(75+45)+63.(67+53)

= 37.120+63.120

= 120.(37+63)

= 120.100

= 12000

b) 35.34+35.86+65.75+65.45

= 35.(34+86)+65.(75+45)

= 35.120+65.120

=120.(35+65)

= 120.100

= 12000

c) 78.31+78.24+78.17+22.72

= 78.(31+24+17)+22.72

= 78.72+22.72

= 72.(78+22)

= 72.100

= 7200

$\mathrm{a)\; 37}.75+37.45+63.67+63.53$

$=37.(75+45)+63.(67+53)$

$=37.120+63.120$

$=(37+63).120$

$=100.120$

$=12000$

b) 35⋅34+35⋅86+65⋅75+65⋅45=35(34+86)+65(75+45)=35⋅120+65⋅120=(35+65)⋅120=100⋅120=12000

c) 78 . 31 + 78 . 24 + 78 . 17 + 22 . 72

= 78 . ( 31 + 24 + 17 ) + 22 . 72

= 78 . 72 + 22 . 72

= 72 . ( 78 + 22 )

= 72 .100

= 7200

chúc bạn học tốt ❤❤❤

a) 37.75+37.45+63.67+63.53

= 37.(75 + 45) + 63.(67 + 53)

= 37 . 120 + 63 . 120

= 120 . (37 + 63)

= 120 . 100

= 12 000

=37.75+37.45-25.2.37-35.14

=37.(75+45+50)-35.14

=37.70-35.14

=37.2.35-35.14

=74.35-35.14

=35.(74-14)

=35.60

=2100

37.75+37.45-25.74-35.14=2100  

`@` `\text {Ans}`

`\downarrow`

\(5\cdot19+5\cdot81\cdot10\)

`=`\(5\cdot\left(19+81\cdot10\right)\)

`=`\(5\cdot\left(19+810\right)\)

`=`\(5\cdot829\)

`= 4145`

____

\(37\cdot54+37\cdot45+37\)

`=`\(37\cdot\left(54+45+1\right)\)

`=`\(37\cdot100\)

`= 3700`

____

`7*32 + 14*34`

`= 7*2*16 + 7*2*34`

`= (7*2)*(16+34)`

`= 14*50`

`= 700`

5.19+5.81.10

=5.(19+81).10

=5.100.10

=500.10

=5000

xong:)

\(37.75+56.75-93.65\)

\(=75.\left(37+56\right)-93.65\)

\(=75.93-93.65\)

\(=93.\left(75-65\right)\)

\(=93.10\)

\(=930\)

thanks

\(37\cdot75+63\cdot75=75\cdot\left(37+63\right)=75\cdot100=7500\)

K MK NHA.

#ngố

37.75 + 63.75

= (37 + 63).75

= 100.75

= 7500

37.15 + 37.45 + 74.20

= 37.15 + 37.45 + 37.2.20

= 37.15 + 37.45 + 37.40

= 37( 15 + 45 + 40 )

= 37.100 = 3700

3 + 7 + 11 + 15 + 19 + 23 + 27 + 31 + 35

= ( 3 + 27 ) + ( 7 + 23 ) + ( 11 + 19 ) + ( 15 + 35 ) + 31

= 30 + 30 + 30 + 50 + 31 = 171

x + ( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ... + ( x + 10 ) = 2029099

( x + x + x +... + x ) + ( 1 + 2 + 3 + ... + 10 ) = 2029099

11x +  55 = 2029099

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