七年级数学上册有理数的计算题精选206Word文档格式.docx
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9
1
6÷
(-—)(-14)×
(-80)-(-5.5)×
200
-60×
4×
(-160)-(-30)(-1)3×
6-(-2)3÷
7
1×
(-—)+(-6)-(-2)(8-6)+33+(0-3)
4
(-4)÷
6×
(-—)+(-6)(8-1)-33×
(0-2)
5、用科学记数法表示下列各数。
160000008007800-400000
1400270000079000-90300
6、下列用科学记数法写出的数,原来分别是什么数?
-6×
1088×
1032.2×
106-2.09×
104
3×
1068.64×
105-9.3×
1026.06×
108
7、用四舍五入法对下列各数取近似数。
0.0000845(精确到万分位)5.48188(精确到10位)
38.7086(精确到0.001)0.0711(精确到0.01)
8、计算。
-9+|1||-9-(-2)||-5|+(-9)
—5,-3.5,0,2.5,-0.25,-3.2,-0.1.
5
2、已知x是正数,并且-1<
0,在数轴上表示x所能取得的所有数值。
—3.5,-7.5,0,-0.75,-1.75,1.8,-3.3.
-500-700-83-(-83)-35-50
-14+(-11)4×
(-3)-4÷
(-12)
-—+21-9-(-14)-8÷
(-2)
8÷
(-—)(-0.6)×
(-18)×
(-60)×
400
1.4×
0.9-(-14)+(-0.55)(-1)2÷
6-(-1)3÷
3
(-—)×
(-2)-(3+8)×
23÷
(3+4)
(-8)×
3÷
(-6)-(9+0)÷
22÷
(5+6)
900000-300000003500000-91000
20000004600000005600-18900
6×
107-3×
1056.6×
107-4.7×
107
-5.4×
106-7.42×
103-4.4×
106-6.37×
0.000092(精确到万分位)3.8927(精确到个位)
0.461575(精确到0.1)0.0872(精确到0.01)
-2+|7||-9+(-9)||-4|-(-5)
—4,-5,0,1.25,-0.25,-0.8,-0.5.
2、已知x是正数,并且-7<
3,在数轴上表示x所能取得的所有数值。
-—-9,6,0,-1.25,-2,-2.2,0.4.
-300+650-30-(-80)-90-55
31-(-26)-4÷
(-4)-2÷
(-28)
304÷
(-2)9-(-28)
6
(-—)(-1.6)×
(-0.6)-(-1.5)×
35
-0.2×
2×
(-1.8)÷
(-3.5)(-2)2×
6-(-4)3÷
5
2÷
(-—)+(-8)+(-1)-(3-9)+12÷
(2+2)
(-8)-2÷
(-—)-(-1)-(1+6)÷
12-(0+2)
15000000-7008400-70500
-20000-15002800000-174000
8×
1058×
1022.8×
1039.37×
-1.4×
1023.69×
1066.1×
1087.59×
106
0.0000928(精确到万分位)143.554(精确到10位)
4.96904(精确到0.1)0.096(精确到0.1)
-7-|-4||-7+(-3)||-2|+(-6)
-—4,-3.5,0,3.25,-1.75,-2.4,-2.8.
-—-9.5,8,0,2,0.25,3.8,2.2.
-950+350-7+(-10)-35+20
-48+(-8)-10÷
(-22)-10+(-7)
—×
12-7×
(-7)7-(-14)
9÷
(-—)(-1.2)×
(-200)-(-30)×
40
-200×
30÷
(-120)×
(-9)(-3)3×
3-(-2)2÷
(-—)-(-9)×
(-3)(2+0)+12÷
(8-1)
(-7)-4÷
(-—)÷
(-8)(4-1)-12÷
(5+9)
16000000-10000099000-7710000000
10001400000073000-25900
102-9×
1071.8×
103-1.63×
4.2×
106-6.99×
1082.8×
1049.9×
0.000733(精确到万分位)1210.13(精确到10位)
0.892166(精确到0.1)0.081(精确到0.001)
5-|-4||4+(-2)||-9|+(-9)
-—4,-5.5,0,1.25,-2.5,-0.6,-2.4.
2、已知x是正数,并且-2<
-—-5.5,9,0,1,2.75,3.2,-3.5.
-900-750-63-(-79)-5+45
-13-(-42)6÷
(-22)8+(-29)
18-2+(-18)8-(-24)
8×
(-—)(-2)×
(-1.4)÷
(-100)×
200×
4+(-80)×
(-1)(-1)2×
5+(-1)3×
4÷
(-—)-(-3)+(-9)(9-0)×
22+(1-8)
(-8)-3÷
(-5)-(1+7)+23+(1-1)
-7000000-80000400-3260000000
200310000001800000-711000000
-8×
103-7×
1039.9×
1051.18×
6.6×
1054.48×
1024.3×
1025.64×
0.000809(精确到万分位)87.4536(精确到10分位)
0.538775(精确到0.1)0.0937(精确到0.001)
7-|-9||8-(-6)||-8|+(-5)