早教吧 育儿知识 作业答案 考试题库 百科 知识分享

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
1
2
)-5
1
4

(4) (-
12
25
)÷(-
3
5
) ;
(5) (-3)×
5
6
×(-
9
5
)×(-
1
4
) ;
(6) -2.5÷
5
8
×(-
1
4
) ;
计算:
(1)(-3)+(-9);
(2)(-4.7)+3.9;
(3) (-3
1
2
)-5
1
4

(4) (-
12
25
)÷(-
3
5
) ;
(5) (-3)×
5
6
×(-
9
5
)×(-
1
4
) ;
(6) -2.5÷
5
8
×(-
1
4
) ;
计算:
(1)(-3)+(-9);
(2)(-4.7)+3.9;
(3) (-3
1
2
)-5
1
4

(4) (-
12
25
)÷(-
3
5
) ;
(5) (-3)×
5
6
×(-
9
5
)×(-
1
4
) ;
(6) -2.5÷
5
8
×(-
1
4
) ;
计算:
(1)(-3)+(-9);
(2)(-4.7)+3.9;
(3) (-3
1
2
)-5
1
4

(4) (-
12
25
)÷(-
3
5
) ;
(5) (-3)×
5
6
×(-
9
5
)×(-
1
4
) ;
(6) -2.5÷
5
8
×(-
1
4
) ;
计算:
(1)(-3)+(-9);
(2)(-4.7)+3.9;
(3) (-3
1
2
)-5
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
)-5
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 2 1 1 2 2
1
4
1 4 1 1 4 4
(-
12
25
)÷(-
3
5
) ;
(5) (-3)×
5
6
×(-
9
5
)×(-
1
4
) ;
(6) -2.5÷
5
8
×(-
1
4
) ;
12
25
12 25 12 12 25 25
3
5
3 5 3 3 5 5
(-3)×
5
6
×(-
9
5
)×(-
1
4
) ;
(6) -2.5÷
5
8
×(-
1
4
) ;
5
6
5 6 5 5 6 6
9
5
9 5 9 9 5 5
1
4
1 4 1 1 4 4
-2.5÷
5
8
×(-
1
4
) ;
5
8
5 8 5 5 8 8
1
4
1 4 1 1 4 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
1
2
)-5
1
4
= -8
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.
(1)(-3)+(-9)=-3-9=-12;
(2)(-4.7)+3.9=-0.8;
(3) (-3
1
2
)-5
1
4
= -8
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.
(1)(-3)+(-9)=-3-9=-12;
(2)(-4.7)+3.9=-0.8;
(3) (-3
1
2
)-5
1
4
= -8
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.
(1)(-3)+(-9)=-3-9=-12;
(2)(-4.7)+3.9=-0.8;
(3) (-3
1
2
)-5
1
4
= -8
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.
(1)(-3)+(-9)=-3-9=-12;
(2)(-4.7)+3.9=-0.8;
(3) (-3
1
2
)-5
1
4
= -8
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.
(-3
1
2
1 2 1 1 1 2 2 2 )-5
1
4
1 4 1 1 1 4 4 4 = -8
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.
-8
3
4
3 4 3 3 3 4 4 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.
(-
12
25
12 25 12 12 12 25 25 25 )÷(-
3
5
3 5 3 3 3 5 5 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.
-
12
25
12 25 12 12 12 25 25 25 ×(-
5
3
5 3 5 5 5 3 3 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.
4
5
4 5 4 4 4 5 5 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.
(-3)×
5
6
5 6 5 5 5 6 6 6 ×(-
9
5
9 5 9 9 9 5 5 5 )×(-
1
4
1 4 1 1 1 4 4 4 ) =-
5
2
×
9
5
×
1
4
= -
9
8

(6) -2.5÷
5
8
×(-
1
4
) =
5
2
×
8
5
×
1
4
=1.
5
2
5 2 5 5 5 2 2 2 ×
9
5
9 5 9 9 9 5 5 5 ×
1
4
1 4 1 1 1 4 4 4 = -
9
8

(6) -2.5÷
5
8
×(-
1
4
) =
5
2
×
8
5
×
1
4
=1.
-
9
8
9 8 9 9 9 8 8 8 ;
(6) -2.5÷
5
8
×(-
1
4
) =
5
2
×
8
5
×
1
4
=1.
-2.5÷
5
8
5 8 5 5 5 8 8 8 ×(-
1
4
1 4 1 1 1 4 4 4 ) =
5
2
×
8
5
×
1
4
=1.
5
2
5 2 5 5 5 2 2 2 ×
8
5
8 5 8 8 8 5 5 5 ×
1
4
1 4 1 1 1 4 4 4 =1.