Question

Tính Nhanh

a, 35x34+35x86+65x75+65x45

b, 3x25x8+4x6x37+2x.8.12

Answer 1

a, 35.(34+86) +65.(75+45)= 35. 120 +65.120= 120.(35+65)=120.100=12000

 

Answer 2

a, 35x34+35x86+65x75+65x45

=35x(34+86)+65x(75+45)

=35x120+65x120

=120x(35+65)

=120x100

=12000

b,3x25x8+4x6x37+2x8x12

=24x25+24x37+24x8

=24x(25+37+8)

=24x70

=1680

Answer 3

35 x 34 + 35 x 86 + 65 x 75 + 65 x 45

= 35 x ( 34 + 86 ) + 65 x ( 65 + 45 )

= 35    x    120   +    65    x     120

 =      120 x ( 35 + 65 )

=           120 x 100 = 12000