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计算:①(-16.8)÷(-3);②(−54)÷(−45);③(+513)÷(−313);④(+1.25)÷(−0.5)÷(−58);⑤-18÷(+3.25)÷(−214).

题目详情
计算:①(-16.8)÷(-3);
(−
5
4
)÷(−
4
5
);
(+5
1
3
) ÷(−3
1
3
);
(+1.25)÷(−0.5)÷(−
5
8
);
⑤-18÷(+3.25)÷(−2
1
4
).

(−
5
4
)÷(−
4
5
);
(+5
1
3
) ÷(−3
1
3
);
(+1.25)÷(−0.5)÷(−
5
8
);
⑤-18÷(+3.25)÷(−2
1
4
).
5
4
5544
4
5
4455
(+5
1
3
) ÷(−3
1
3
);
(+1.25)÷(−0.5)÷(−
5
8
);
⑤-18÷(+3.25)÷(−2
1
4
).
1
3
1133
1
3
1133
(+1.25)÷(−0.5)÷(−
5
8
);
⑤-18÷(+3.25)÷(−2
1
4
).
5
8
5588
(−2
1
4
).
1
4
1144
▼优质解答
答案和解析
①原式=16.8÷3,
=16.8×
1
3

=5.6;

②原式=
5
4
÷
4
5

=
5
4
×
5
4

=
25
16


③原式=-
16
3
÷
10
3

=-
16
3
×
3
10

=
8
5


④原式=1.25÷0.5÷
5
8

=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
1
3
111333,
=5.6;

②原式=
5
4
÷
4
5

=
5
4
×
5
4

=
25
16


③原式=-
16
3
÷
10
3

=-
16
3
×
3
10

=
8
5


④原式=1.25÷0.5÷
5
8

=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
5
4
555444÷
4
5
444555,
=
5
4
×
5
4

=
25
16


③原式=-
16
3
÷
10
3

=-
16
3
×
3
10

=
8
5


④原式=1.25÷0.5÷
5
8

=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
5
4
555444×
5
4
555444,
=
25
16


③原式=-
16
3
÷
10
3

=-
16
3
×
3
10

=
8
5


④原式=1.25÷0.5÷
5
8

=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
25
16
252525161616;

③原式=-
16
3
÷
10
3

=-
16
3
×
3
10

=
8
5


④原式=1.25÷0.5÷
5
8

=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
16
3
161616333÷
10
3
101010333,
=-
16
3
×
3
10

=
8
5


④原式=1.25÷0.5÷
5
8

=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
16
3
161616333×
3
10
333101010,
=
8
5


④原式=1.25÷0.5÷
5
8

=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
8
5
888555;

④原式=1.25÷0.5÷
5
8

=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
5
8
555888,
=
5
4
×2×
8
5

=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
5
4
555444×2×
8
5
888555,
=4;

⑤原式=18÷3.25÷2
1
4

=18×
4
13
×
4
9

=
32
13
1
4
111444,
=18×
4
13
×
4
9

=
32
13
4
13
444131313×
4
9

=
32
13
4
9
444999,
=
32
13
32
13
323232131313.