Question

tính nhanh 

35*34+35*38+65*75+65*45

Answer 1

35x34+35x38+65x75+65x45

=35x(34+38)+65x(75+45)

=35x72+65x120

=2520+7800

=10320

Answer 2

=35*(34+38)+65*(75+45)

=35*70+65*120

=2450+7800

=10250

Answer 3

35.34 + 35.38 + 65. 75 + 65- 45

= [35.(34+38)] + [65.(75+45)]

= (35.72) + (65.120)

= 2520 + 7800

= 10320