Question

 Tính nhanh:    123,45 + 23,56 + 76,44 + 54,55

Answer 1

 Tính nhanh:    123,45 + 23,56 + 76,44 + 54,55

= (123,45 + 54,55) + (23,56 + 76,44)

= 178 + 100

=278

Answer 2

      123,45 + 23,56 + 76,44 + 54,55   =
                                            (123,45 + 54,55) + (23,56 + 76,44)  =
                                                    178           +          100                 =  278
 

Answer 3

123,45 + 23,56 + 76,44 + 54,55

= ( 123,45 + 54,55 ) + ( 23,56 + 76,44 )

= 178 + 100

= 278

Answer 4

123,45+23,56+76,44+54,55

=(123,45+54,55)+(23,56+76,44)

=178+100

=278
 

Answer 5

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