Question

3 tính nhanh

57,89 x 5 - 57,89 + 57,89 x 6

145,5 - 15,2 - 42,3

Answer 1

57,89*(5-1+6)

=57,89*10

=578,9

b 145,5-(15,2+42,3)

145,5-57,5

=88

Answer 2

57,89x5-57,89+57,89x6

=57,89x5-57,89x1+57,89x6

=(5-1+6)x57,89

=10x57,89

=578,9

145,5-15,2-42,3

=145,5-(15,2+42,3)

=145,5-57,5

=88

Answer 3

57,89(5-1+6)=578,9

145,5-15,2-42,3=88

Answer 4

  57,89 x 5 - 57,89 + 57,89 x 6 

= 57,89 x 5 * 57,89 x 1 - 57,89 x 6 

 = 57,89 x ( 5 - 1 + 6 )

= 57,89 x ( 4 + 6 )

= 57,89 x 10

= 578,9

    145,5 - 15,2 - 42,3

= 145,5 - 42,3 - 15,2

= 103,2 - 15,2

= 88