Question

Tính nhanh

2.7.4+2.23.50

43.37+93.43+57.61+69.57

Answer 1

43.37 + 93.43 + 57.61 + 69.57

= 43.(37+93) + 57.(61+69)

= 43.130 + 57.130

= 130.(43+57)

= 130.100

= 13000

Answer 2

43 x 37 + 93 x 43 + 57 x 61 + 69 x 57

= 43 x ( 37 + 93 ) + 57 x ( 61 + 69 )

= 43 x 130 + 57 x 130

= ( 43 + 57 ) x 130

= 100 x 130

= 13000

Answer 3

A,= 2.( 4.50)+ ( 7.4.23)

=2.200 + 644

=400+ 644

=1044

B, = 43.( 37 + 93)+ 57.(61+69)

=43.130 + 57.130

=130.( 43 + 57)

=130 + 100

=13000