Question

tính nhanh 

43.6+42.4+40+38.8+36.4+35.2+32.8+31.6+29.2

ai nhanh mình k cho,mình đang cần gấp

Answer 1

43.6+42.4+40+38.8+36.4+35.2+32.8+31.6+29.2

=(43.6+36.4)+(42.4+31.6)+(35.2+32.8)+(32.8+29.2)+40

=80+74+68+62+40

=(80+40)+(68+62)+74

=120+130+74

=250+74

=324