Question

18x17-3x6x7

33x[17-5]-17x[33-5]

54-6x[17+9]

Answer 1

18 * 17 - 3 * 6 * 7

= 18 * 17 - 18 * 7

= 18 * ( 17 - 7 )

= 18 * 10

= 180

33 * ( 17 - 5 ) - 17 * ( 33 - 5 )

= ( 33 * 17 - 33 * 5 ) - ( 17 * 33 - 17 * 5 )

= 33 * 17 - 33 * 5 - 17 * 33 + 17 * 5

= 33 * 17 - 17 * 33 - 33 * 5 - 17 * 5

= 33 * ( 17 - 17 ) - 33 * 5 - 17 * 5

= 33 * 0 - 5 * ( 33 - 17 )

= 0 - 5 * 16

= 0 - 80

 = -80

54 - 6 * ( 17 + 9 )

= 6 * 9 - 6 * 26

= 6 * ( 9 - 26 )

= 6 * ( -17 )

= -102

Answer 2

x la dấu nhân nha các bạn

Answer 3

18.17-3.6.7=18.17-18.7=18.(17-7)=18.10=180

33.[17-5]-17.[33-5]=33.17-33.5-17.33-17.5=0-33.5-17.5=0-5.(33-17)=0-5.16=0-80=-80

54-6.(17+9)=54-6.17+6.9=54-102+54=0-102=-102

Answer 4

a,18 x 17 - 3 x 6 x7

= 18 x 17 - 18 x 7

= 18 x ( 17-10)

= 18 x 10

= 180

b, 33 x [ 17 - 5 ] - 17 x [33-5] = -80

c, 54 -6 x [ 17 +9 ] = -102