Question

[nguyenquocthanh]

Bài 1: Tính nhanh

A = (a x 7 + a x 8 - a x 15) : (1 + 2 + 3 + ........ + 10)

B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)

Answer 1

[★K!nky๖ۣۜ♑`]

A = (a x 7 + a x 8 - a x 15) : (1 + 2 + 3 + ........ + 10)

A = [a x ( 7 + 8 - 15 )] : [ ( 1 + 9 ) + ( 2 + 8 ) + ( 3 + 7 ) + ( 4 + 6 ) + 5 ]

A = [a x 0] : [ 10 x 4 + 5 ]

A = 0 : 45

A = 0

B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)

B = (18 - 18) x [ ( 2 + 8 ) + ( 4 + 6 ) + 10 ]

B = 0 x [10 x 3]

B = 0 x 30

B = 0

#Hok_tốt

Answer 2

[✫°”˜˜”°♌️NTTH♌️°”˜˜”°✫(๖team lion๖)]

B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)

B = (18 - 18) x 30

B = 0 x 30

=> B = 0