问题
解答题
计算: (1)0.125×(-7)×8; (2)-
(3)-9
(4)(-1
(5)[2
(6)(-370)×(-
|
答案
(1)原式=(0.125×8)×(-7)
=1×(-7)
=-7;
(2)原式=-
+(1 12
×3 10
+10 3
)÷1 3 1 4
=-
+1 12
×44 3
=-
+1 12 16 3
=
;21 4
(3)原式=(-10+
)×(-69)1 23
=(-10)×(-69)+
×(-69)1 23
=690-3
=687;
(4)原式=(-1
)×(-24)-1 2
×(-24)+3 8
×(-24)7 12
=36+9-14
=31;
(5)原式=[
-(5 2
×36-7 9
×36+11 12
×36)]÷51 6
=[
-(28-33+6)]÷55 2
=[
-1]÷55 2
=
×3 2 1 5
=
;3 10
(6)原式=370×
+1 4
×24.5+1 4
×11 2 1 4
=
×(370+24.5+1 4
)11 2
=
×4001 4
=100.