有理数乘除法专项练习71题(有答案)Word格式.doc
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有理数乘除法专项练习71题(有答案)Word格式.doc
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5×
.
25..
26..
27.﹣2.5÷
()×
()÷
(﹣4)
28.
29.
30.
31.(﹣)×
32.
33.
34.(﹣16)÷
×
35.(﹣)×
(﹣)×
0×
36.
37.(﹣﹣)×
(﹣24)
38.
39.
40.
41.(﹣1)÷
0.8×
(﹣).
42.(﹣1)
43.
44.﹣18÷
(+3.25)÷
45.(﹣10)÷
(﹣8)÷
(﹣0.25)
46.(﹣24)
47.(+22)×
(﹣33)×
(﹣4)×
48.(﹣32)÷
4×
(﹣8)
49.
50.×
0.125×
51.﹣125÷
(﹣25)﹣64÷
52.
53.
54.
55.
56.
57.
58.
59.[(+)﹣(﹣)﹣(+)]÷
60.2×
1
61.
62.
63.
64.
65.
66.(﹣5)×
(﹣0.75)﹣(﹣5)×
0.125+(﹣5)×
(﹣0.125)
67.(﹣6.5)×
68.
69.
70.
71.
有理数乘除法71题参考答案:
1.原式=(﹣﹣+)×
24
=﹣×
24﹣×
24+×
24=﹣16﹣20+22=﹣14.
2.原式=×
()=1.
3.原式=2×
(﹣18)×
(﹣)=×
18×
,=16.
(﹣2)=2×
(﹣2)=﹣4.
=(﹣)×
=﹣
6.原式=(﹣)×
=﹣(×
)=﹣.
7.原式=﹣×
(﹣)=﹣
,
=×
36,=﹣27﹣8+15,=﹣20.
9.原式=
=
=﹣14+18﹣4=0.
10.1÷
(﹣3)×
(﹣),
=1×
(﹣),=.
11.
(﹣)=﹣1.
12.(﹣++﹣)÷
=(﹣++﹣)×
(﹣12),
(﹣12)+×
(﹣12)﹣×
=6﹣4﹣10+9,=15﹣14,=1.
13.原式=×
2=(﹣2)×
2=﹣4.
14.原式=×
=.
15.原式=×
=.
16.原式=﹣×
(﹣11)=3.
17.﹣2.5÷
(﹣)÷
=﹣.
18.原式=(﹣7.5)×
19.原式=(﹣)×
)=﹣4.
20.原式=(﹣﹣+)×
20
20﹣×
20+×
20=﹣10﹣5+4=﹣11.
21.原式=(﹣+)×
(﹣42)
(﹣42)﹣×
(﹣42)+×
=﹣14+22﹣9=﹣1.
22.
(﹣36)﹣×
(﹣36)+×
(﹣36)
=﹣27+30﹣21=﹣18.
23.原式=(﹣﹣)×
=﹣63+30+51=18.
24.原式=﹣10×
=﹣
25.原式=(﹣2)×
=﹣2×
2×
3×
3=﹣36.
26.原式=﹣32÷
(﹣32)
=﹣32×
(﹣)=32×
=(32+)×
=32×
+×
=1+=1.
27.原式=﹣×
28.原式=(﹣12)×
=﹣16×
=﹣24
29.原式=(﹣+)÷
(﹣24)=﹣3,
30.原式=﹣12×
﹣8×
+9×
(﹣12﹣8+9)=﹣
10﹣(﹣)×
﹣(﹣)×
=﹣6+1+=﹣.
32.原式=﹣×
=3.
33.,
=,=.
34.(﹣16)÷
=(﹣16)×
(﹣)=20.
35.原式=0
36.原式=(﹣)×
(﹣4)=﹣(×
4)
=﹣
37.原式=×
(﹣24)﹣×
=﹣20+18+8=6
38.原式=3×
(﹣)=3×
39.原式=28×
=10.
40.=(﹣)×
=﹣4.
41.原式=﹣×
42.原式=,
=,=.
43.原式=1.25÷
0.5÷
,=,=4
44.原式=18÷
3.25÷
2,=18×
,=
45.原式=﹣10×
=﹣5
46.原式=12÷
(﹣1)=12×
(﹣)=﹣10
0=0
(﹣8)
=(﹣8)×
(﹣8)=64
49.75÷
(﹣)=75×
=
50.(﹣)×
(﹣2)×
(﹣8)=﹣1
(﹣4)=5+16=21.
52.[45﹣(﹣+)×
36]÷
5,
=[45﹣×
36﹣(﹣)×
36﹣×
=(45﹣28+33﹣30)÷
5,=(78﹣58)÷
=20÷
5,=4
53.﹣×
(﹣92)+(﹣)×
34+×
23,
92﹣×
23,=×
(92﹣34+23),
(92﹣11),=×
81,=18.
54.﹣1.53×
0.75+1.53×
1.53,
=1.53×
(﹣0.75+0.5+0.8),
(1.3﹣0.75),=1.53×
0.55,=0.8415
55.(2﹣3+1)÷
(﹣1),
=(﹣+)×
(﹣)﹣×
(﹣)+×
=﹣2+3﹣,=3﹣3,=﹣.
56.原式=﹣81×
=﹣36﹣=﹣36.
57.2÷
6=2×
6×
6=72.
58.原式=(﹣++)×
(﹣32)+×
=16﹣24﹣20=﹣28
59.[(+)﹣(﹣)﹣(+)]÷
=(+﹣)×
(﹣105)
(﹣105)+×
(﹣105)﹣×
=﹣15﹣35+21=﹣50+21=﹣29.
60.原式=×
),=﹣.
61.原式=(﹣+﹣)×
(﹣14)
(﹣14)﹣×
(﹣14)+﹣×
=﹣+6﹣+9
=﹣﹣+6+9
=﹣16+15
=﹣1.
62.原式=÷
(﹣0.25)=.
(﹣24)+×
=﹣3﹣16+18
64.(1﹣2+3﹣4)÷
=(﹣+﹣)×
(﹣30),
(﹣30)﹣×
(﹣30)+×
=﹣54+85﹣111+136,
=221﹣165,
=56
65.原式=81×
=1
66.原式=(﹣5)×
(﹣0.75﹣0.125﹣0.125)
=(﹣5)×
(﹣1)
=5.
67.原式=×
68.原式=﹣30×
=24×
=6
69.原式=×
70.(﹣)×
71.原式=(﹣48)×
=(﹣48)×
=4
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