Tính nhanh a, (-2) . (-3) b, (-15) . 2 c, 36 . 84 + 36 . 16 d, (-12) . 123 + 12 . 113 13/07/2021 Bởi Delilah Tính nhanh a, (-2) . (-3) b, (-15) . 2 c, 36 . 84 + 36 . 16 d, (-12) . 123 + 12 . 113
a, (-2) . (-3) =6 b, (-15) . 2 =-30 c, 36 . 84 + 36 . 16 =36.(84+16) =36.100 =3600 d, (-12) . 123 + 12 . 113 =12.(-123+113) =12.(-10) =-120 Bình luận
a) ( -2 ) . ( -3 ) = 2 . 3= 6 b) ( -15 ) . 2 = -30 c) 36 . 84 + 36 . 16= 36 . ( 84 + 16 ) = 36 . 100 = 3600 d) ( -12 ) . 123 + 12 . 113= -12 . ( 123 – 113 ) = -12 . 10 = -120 Bình luận
a, (-2) . (-3)
=6
b, (-15) . 2
=-30
c, 36 . 84 + 36 . 16
=36.(84+16)
=36.100
=3600
d, (-12) . 123 + 12 . 113
=12.(-123+113)
=12.(-10)
=-120
a) ( -2 ) . ( -3 )
= 2 . 3
= 6
b) ( -15 ) . 2
= -30
c) 36 . 84 + 36 . 16
= 36 . ( 84 + 16 )
= 36 . 100
= 3600
d) ( -12 ) . 123 + 12 . 113
= -12 . ( 123 – 113 )
= -12 . 10
= -120