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计算:(1)(-3)+(-9);(2)(-4.7)+3.9;(3)(-312)-514;(4)(-1225)÷(-35);(5)(-3)×56×(-95)×(-14);(6)-2.5÷
题目详情
计算: (1)(-3)+(-9); (2)(-4.7)+3.9; (3) (-3
(4) (-
(5) (-3)×
(6) -2.5÷
|
(1)(-3)+(-9);
(2)(-4.7)+3.9;
(3) (-3
1 |
2 |
1 |
4 |
(4) (-
12 |
25 |
3 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
(6) -2.5÷
5 |
8 |
1 |
4 |
(1)(-3)+(-9);
(2)(-4.7)+3.9;
(3) (-3
1 |
2 |
1 |
4 |
(4) (-
12 |
25 |
3 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
(6) -2.5÷
5 |
8 |
1 |
4 |
(1)(-3)+(-9);
(2)(-4.7)+3.9;
(3) (-3
1 |
2 |
1 |
4 |
(4) (-
12 |
25 |
3 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
(6) -2.5÷
5 |
8 |
1 |
4 |
(1)(-3)+(-9);
(2)(-4.7)+3.9;
(3) (-3
1 |
2 |
1 |
4 |
(4) (-
12 |
25 |
3 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
(6) -2.5÷
5 |
8 |
1 |
4 |
(-3
1 |
2 |
1 |
4 |
(4) (-
12 |
25 |
3 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
(6) -2.5÷
5 |
8 |
1 |
4 |
1 |
2 |
1 |
4 |
(-
12 |
25 |
3 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
(6) -2.5÷
5 |
8 |
1 |
4 |
12 |
25 |
3 |
5 |
(-3)×
5 |
6 |
9 |
5 |
1 |
4 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
6 |
9 |
5 |
1 |
4 |
-2.5÷
5 |
8 |
1 |
4 |
5 |
8 |
1 |
4 |
▼优质解答
答案和解析
(1)(-3)+(-9)=-3-9=-12;
(2)(-4.7)+3.9=-0.8;
(3) (-3
)-5
= -8
;
(4) (-
)÷(-
) = -
×(-
) =
;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1. (1)(-3)+(-9)=-3-9=-12;
(2)(-4.7)+3.9=-0.8;
(3) (-3
)-5
= -8
;
(4) (-
)÷(-
) = -
×(-
) =
;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1. (1)(-3)+(-9)=-3-9=-12;
(2)(-4.7)+3.9=-0.8;
(3) (-3
)-5
= -8
;
(4) (-
)÷(-
) = -
×(-
) =
;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1. (1)(-3)+(-9)=-3-9=-12;
(2)(-4.7)+3.9=-0.8;
(3) (-3
)-5
= -8
;
(4) (-
)÷(-
) = -
×(-
) =
;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1. (-3
1 2 1 1 1 2 2 2 )-5
1 4 1 1 1 4 4 4 = -8
;
(4) (-
)÷(-
) = -
×(-
) =
;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1. -8
3 4 3 3 3 4 4 4 ;
(4) (-
)÷(-
) = -
×(-
) =
;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1. (-
12 25 12 12 12 25 25 25 )÷(-
3 5 3 3 3 5 5 5 ) = -
×(-
) =
;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1. -
12 25 12 12 12 25 25 25 ×(-
5 3 5 5 5 3 3 3 ) =
;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1.
4 5 4 4 4 5 5 5 ;
(5) (-3)×
×(-
)×(-
) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1. (-3)×
5 6 5 5 5 6 6 6 ×(-
9 5 9 9 9 5 5 5 )×(-
1 4 1 1 1 4 4 4 ) =-
×
×
= -
;
(6) -2.5÷
×(-
) =
×
×
=1.
5 2 5 5 5 2 2 2 ×
9 5 9 9 9 5 5 5 ×
1 4 1 1 1 4 4 4 = -
;
(6) -2.5÷
×(-
) =
×
×
=1. -
9 8 9 9 9 8 8 8 ;
(6) -2.5÷
×(-
) =
×
×
=1. -2.5÷
5 8 5 5 5 8 8 8 ×(-
1 4 1 1 1 4 4 4 ) =
×
×
=1.
5 2 5 5 5 2 2 2 ×
8 5 8 8 8 5 5 5 ×
1 4 1 1 1 4 4 4 =1.
(1)(-3)+(-9)=-3-9=-12; (2)(-4.7)+3.9=-0.8; (3) (-3
(4) (-
(5) (-3)×
(6) -2.5÷
|
(2)(-4.7)+3.9=-0.8;
(3) (-3
1 |
2 |
1 |
4 |
3 |
4 |
(4) (-
12 |
25 |
3 |
5 |
12 |
25 |
5 |
3 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
(2)(-4.7)+3.9=-0.8;
(3) (-3
1 |
2 |
1 |
4 |
3 |
4 |
(4) (-
12 |
25 |
3 |
5 |
12 |
25 |
5 |
3 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
(2)(-4.7)+3.9=-0.8;
(3) (-3
1 |
2 |
1 |
4 |
3 |
4 |
(4) (-
12 |
25 |
3 |
5 |
12 |
25 |
5 |
3 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
(2)(-4.7)+3.9=-0.8;
(3) (-3
1 |
2 |
1 |
4 |
3 |
4 |
(4) (-
12 |
25 |
3 |
5 |
12 |
25 |
5 |
3 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
1 |
2 |
1 |
4 |
3 |
4 |
(4) (-
12 |
25 |
3 |
5 |
12 |
25 |
5 |
3 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
3 |
4 |
(4) (-
12 |
25 |
3 |
5 |
12 |
25 |
5 |
3 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
12 |
25 |
3 |
5 |
12 |
25 |
5 |
3 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
12 |
25 |
5 |
3 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
4 |
5 |
(5) (-3)×
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
5 |
6 |
9 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
5 |
2 |
9 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
9 |
8 |
(6) -2.5÷
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
5 |
8 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
5 |
2 |
8 |
5 |
1 |
4 |
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