Question

       Tính bằng cách thuận tiện :

          45,28 + 52,17 - 15,28 - 12,17                                                   ( 72,69 + 18,47 ) - ( 8,47 + 22,69 )

Answer 1

45,25+52,17-15.28-12.17=(45.28-15.28)+(52.17-12.17)=30+50=80

(72.69+18.47)-(8.47+22.69)=72.69+18.47-8.47-22.69

=(72.69-22.69)+(18.47-8.47)

=50+10=60

mình nha

Answer 2

   45,28 + 52,17 - 15,28 - 12,17               

=(45,28 - 15,28)+(52,17- 12,17  )

=30+40=70     

Answer 3

   45,28 + 52,17 - 15,28 - 12,17

= ( 45,28 - 15,28 ) + ( 52,17 - 12,17 )

= 30 + 40

= 70

   ( 72,69 + 18,47 ) - ( 8,47 + 22,69 )

= 72,69 + 18,47 - 8,47 - 22,69

= ( 72,69 - 22,69 ) + ( 18,47 - 8,47 )

= 50 + 10

= 60

     _Hok tốt_

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Answer 4

( 72,69 + 18,47 ) - ( 8,47 + 22,69 )

=72,69 + 18,47  -8,47 - 22,69

=(72,69 - 22,69)+(18,47  -8,47)

= 50+10=60

Answer 5

45,28 + 52,17 - 15,28 - 12,17

= (45,28 - 15,28) + (52,17 - 12,17)

= 20 + 40

= 60

(72,69 + 18,47) - (8,47 + 22,69)

= 72,69 + 18,47 - 8,47 - 22,69

= (72,69 - 22,69) + (18,47 - 8,47)

= 50 + 10

= 60

Answer 6

= ( 45,28 -15,28 )+(52,17 -12,17)

=30+40=70

Answer 7

45,28 + 52,17 - 15,28 - 12,17

=  ( 45,28 - 15,28 ) + ( 52,17 -- 12,17

= 30 + 40

=70

Answer 8

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