計算:
(1)0.125×(-7)×8;
(2)-
十(0.3×3
+
)÷|-
|;
(3)-9
×(-69);
(4)(-1
-
+
)÷(-
);
(5)[2
-(
-
+
)×36]÷5;
(6)(-370)×(-
)+0.25×24.5+(-5
)×(-25%).
(1)原式=(0.125×8)×(-7)
=1×(-7)
=-7;
(2)原式=-
+(
×
+
)÷
=-
+
×4
=-
+
=
;
(3)原式=(-10+
)×(-69)
=(-10)×(-69)+
×(-69)
=690-3
=687;
(4)原式=(-1
)×(-24)-
×(-24)+
×(-24)
=36+9-14
=31;
(5)原式=[
-(
×36-
×36+
×36)]÷5
=[
-(28-33+6)]÷5
=[
-1]÷5
=
×
=
;
(6)原式=370×
+
×24.5+
×
=
×(370+24.5+
)
=
×400
=100.
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科目:初中數(shù)學(xué)
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計算題
(1)-8+12-(-16)-|-23|
(2)
(-2.25)+(-5.1)++(-4)+(-)(3)
42×(-)-(-)÷(-0.25)(4)
(1--)÷(-)+(-)(5)
4×[-32×(-)2-0.8]÷(-5).
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