(1) 17-8÷(-2)+4×(-3) (2) 1-25÷5/6×(-1/10) (3)18-6÷(-2)×(-1/3) (4)6÷(1/2-1/3) (5)11/5×(1/3-1/2)×3/11÷5/4 (6)2又1/4×(-6/7)÷(1/2-2) (7)-2×3²- (-2×3²)

问题描述:

(1) 17-8÷(-2)+4×(-3) (2) 1-25÷5/6×(-1/10) (3)18-6÷(-2)×(-1/3) (4)6÷(1/2-1/3) (5)11/5×(1/3-1/2)×3/11÷5/4 (6)2又1/4×(-6/7)÷(1/2-2) (7)-2×3²- (-2×3²)

(1)17-8÷(-2)+4×(-3)
=17-(-4)+(-12)
=17+4-12
=9
(2) 1-25÷5/6×(-1/10)
=1-30x(-1/10)
=1-(-3)
=4
(3)18-6÷(-2)×(-1/3)
=18-(-3)×(-1/3)
=18-1
=17
(4)6÷(1/2-1/3)
=6÷(1/6)
36

(1) =17-(-4)+(-12)=17+4-12=9
(2)=1-30x(-0.1)=1+3=4
(3)=18-(-3)x(-1/3)=18-1=17
(4)=6x(5/6)=5
(5)=11/5x(-1/6)x3/11x4/5=-2/25
(6)=9/4x(-6/7)x(-2/3)=9/7
(7)=-2x9+18=0

(1)=17-(-4)+(-12)=21-12=9
(2)=1-25X6/5X-1/10=1-30X-1/10=1+3=4
(3)=18-(-3)X(-1/3)=18-1=17
(4)=6/(3/6-2/6)=6/(1/6)=36
(5)11/5X(-1/6)X(3/11)X(4/5)=-2/25
(6)9/4X(-6/7)÷(-3/2)=(-27/14)÷(-3/2)=9/7
(7)=-2X9-(-18)=-18+18=0