题目内容
【题目】计算:
(1)-42×
-(-5)×0.25×(-4)3
(2)(4
-3
)×(-2)-2
÷(-
)
(3)(-
)2÷(-
)4×(-1)4 -(1
+1
-2
)×24
(4)(
-
)×52÷|-
|+(-
)0+(0.25)2019×42019
【答案】(1)-90(2)
(3)2(4)12
【解析】
根据有理数的运算法则与幂的运算公式即可求解.
(1)-42×
-(-5)×0.25×(-4)3
=-16×
-5×0.25×64
=-10-80
=-90
(2)(4
-3
)×(-2)-2
÷(-
)
=(
)×(-2)+![]()
=![]()
=![]()
(3)(-
)2÷(-
)4×(-1)4 -(1
+1
-2
)×24
=
-1
×24-1
×24+2
×24
=1-33-32+66
=2
(4)(
-
)×52÷|-
|+(-
)0+(0.25)2019×42019
=
+1+(0.25×4) 2019
=10+1+1
=12
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