Question

Tính nhanh

a.64,42 x 2,34 - 2,24 x64,42                                                 b.45,96 x 8,24 + 45,96 x 1,76

c.12,68 x 0,3 + 12,68 x 0,7                                                   d.35,78 x 5,9 + 35,78 x 4,1

Answer 1

a) 64,42 x 2,34 - 2,24 x 64,42

= 64,42 x ( 2,34 - 2,24 )

= 64,42 x 0,1

= 6,442

b) 45,96 x 8,24 + 45,96 x 1,76

= 45,96 x ( 8,24 + 1,76 )

= 45,96 x 10

= 459,6

c) 12,68 x 0,3 + 12,68 x 0,7

= 12,68 x ( 0,3 + 0,7)

= 12,68 x 1

= 12,68

d) 35,78 x 5,9 + 35,78 x 4,1

= 35,78 x ( 5,9 + 4,1 )

= 35,78 x 10

= 357,8

Answer 2

a)64,42*(2,34-2,24)

=64,42*0,1

=6442

Answer 3

b)45,96*(8,24+1,76)

=45,96*10

=159,6

Answer 4

c)12,68*(0,3+0,7)

=12,68*1

=12,68

Answer 5

d)35,78*(5,9+4,1)

=35,78*10

=357,8

Answer 6

a. 64,42*(2.34 - 2.24)

64.42* 0.1

=6.442

b.45.96*(8.24+1.76)

45.96* 10

= 459.6

c.12.68*(0.3+0.7)

12.68*10=126.8

d,35.78*(5.9+4.1)

35.78*10=357.8