Question

a)37.75+37.45+63.67+63.53

b)35.34+35.86+65.75+65.45

c)78.31+78.24+78.17+22.72

làm nhanh giúp mình với

 

Answer 1

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

Answer 2

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

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

$=37.120+63.120$

$=(37+63).120$

$=100.120$

$=12000$

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 ❤❤❤

 

Answer 3

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

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

$=37.120+63.120$

$=(37+63).120$

$=100.120$

$=12000$

 

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