第一篇:五年级下册数学竞赛题
大坪完小五1班2013年春季数学竞赛试题(含答案)
(总分100分,时间45分钟)
姓名得分:
一、找规律填数。(38分,每空2分)
⑴ 1、4、5、8、9、、12、13、(16)、(17)、(20)、(21)。(间隔两个数字写两个)⑵ 4、6、8、9、12、15、(16)、(18)、(20)、(21)。(合数)
⑶ 2、3、5、7、9、11、(13)、(17)、(19)、(23)。(质数)
⑷ 1、2、4、7、11、16、(22)、(29)、(37)、(46)。(间隔依次递增)
⑸△、□、〇分别代表三个不同的数,并且: △+△+△=〇+〇 ; 〇+〇+〇+〇=□+□+□;△+〇+〇+□=60,那么△=(10)、□=(20)、〇=(15)(用方程原理解决)
二、看清楚,我能算。(要写出简便的过程)(32分,每小题8分)
⑴ 1.25+2.25+3.25+4.25+„+40.25⑵ 12345×909+12345×9090
=(1+2+3+„„+40)+0.25×40=12345×(909+9090)
=(1+40)+(2+39)+ „„+(20+21)+10=12345×9999
=41×20+10=12345×(10000-1)
=820+10=123450000-12345
=830=123437655
⑶1+2+3+4+5+6+7+8+9+„+97+98+99+100⑷3523×13+3523×28+3523×58+3523 =(1+100)+(2+99)+ „„+(50+51)=3523×(13+28+58+1)
=101×50=3523×100
=5050=352300
三、我会学,我会用。(必须写出计算过程)(30分)
⑴某小学五年级的学生参加植树劳动,若7人一组剩6人,若8人一组剩7人,若9人一组剩8人,五年级有学生多少人?(8分)
分析:7,8,9人一组均少一人,如果增加一人就能同时满足7人,8人,9人一组,即是7,8,9的最小公倍数。
7×8×9-1
=56×9-1
=504-1
=503(人)
⑵小华参加学校的知识竞答比赛,答对一题给4分,答错一题要倒扣4分,她一共答了20题,结果只得了56分,请问她答错了多少道题?(10分)
分析:先假设20题全部答对,总分为80分。如答错一题要扣4分,而且还要把假设答对加的4分也扣除,所以实际少了8分。
(20×4-56)/(4+4)
=24/8
=3(题)
⑶兄弟俩今年的年龄和是30岁,当哥哥像弟弟现在这样大时,弟弟的年龄恰好是哥哥年龄的一半,哥哥今年几岁?(12分)
方法⑴:设弟弟今年有X岁,则哥哥今年有30-X岁,哥哥比弟弟大30-X-X,即30-2X。根据第二个条件列出方程:X=【X-(30-2X)】×2
方法⑵:因为哥哥减去与弟弟的相差的岁数,等于弟弟现在的年龄,而弟弟也减去与哥哥相差的年龄后,是哥哥以前的1/2,也就是现在弟弟的年龄的,说明弟弟的年龄是两份“相差岁数”,哥哥是三分“相差岁数”,那弟弟哥哥总共为五份“相差岁数”。
30/5=6岁
6×3=18岁
第二篇:五年级数学计算竞赛题
________________________线__名姓 订 号考 级班 装 校学
2017—2018学下学期数学科计算能力竞赛题
五年级
成绩 备注:时间为30分钟,满分100分。
一、直接写出得数:(34分,每小题,1分)
7.2+2.8 =
12×0.5 = 2.63+0.37 = 9.6÷0.3 =
4.5-4.5 = 2.5×4 = 1×2.5 = 3.5-0.2 =
0÷0.9 =
1-0.1 = 0.2 ÷ 1 = 4.8 + 2 =
0.25×0 = 6.5-5.6 =
1.25×8 = 0.4×0.2 =
3.5+7.6 = 1.23÷3 =
2.4+2.5 = 16-1.6 = 0.9×0.8= 1.6÷0.01=
8.8×0.1= 0.96÷3 = 1.72-0.39= 1.8+0.11= 6³= 2.4×0.5=
1.25×80=
3.6÷0.06= 1÷3= 29÷18=(结果为带分数)2.5×4÷2.5×4=
7.28×99+7.28=
二、脱式计算,能用简便方法计算的用简便方法计算。(30分,每小题5分)
5+4.2÷0.1
1.25 × 0.5 × 8
5.6 × 0.2 + 5.6 × 0.8 8.2×101-8.2
3.8×4.8+0.38×52 73.5÷2.5÷0.4
三、解方程:(8分每小题16分)
3X÷6 = 1.8 2.5×4÷X = 2
3x+4.5=16.5 x-0.2x=4.8
四、约分并把假分数化成带分数。(20分)
82= 294= 86836= 136= 2
194=
第三篇:五年级上数学口算竞赛题
五年级上数学口算竞赛题
姓名:
得分:
一、直接写得数。
1-0.01= 0.2×0.3= 0.32÷0.4= 0.5-0.05= 2.5+6.5= 1÷0.01= 10÷0.5= 2.4×5= 3.5×0.2= 0.72÷0.9= 1-0.01= 0.2÷0.1= 4.8 + 2 = 0.254.3+0.57= 1.255.5+1.45= 0.70÷3.5= 270.2+0.7= 5.9-5= 1.40.8÷1.6= 2+0.03= 1-0.25= 1.8+0.02= 8.01+0.19= 3.5+6.5= 65×0.7= 10.04×20= 163.4-1.4= 7.82-7.2= 2.190.68+0.42= 8.10.89-0.25= 0.51+3.89= 0.0812.5×0.4= 2.43.99×1= 010×0.05= 0.130.05×4= 40.8×7= 1.55×0.6= 0.90.4×50= 300.35×0.2= 7.50.09×30= 3.9
×40= 9.6×16= 2×1.3= 9.4÷54= 2.5÷0.2= 12.5×2.5= 55.8-5.1= 0.728×400= 19.9+11.1= 187×10= 75×5= 0.22×3.52= 2.5×7= 0.21×0.3= 2.3×7= 1.02×0.3= 3.5×0.1= 2.6×0.1= 1+0.39= 4.8÷32= 1÷5= 0.81÷0.1= 10.1×12= 4.52×0.3= 0.75÷12= 8.4×8= 0.16÷1000= 6.03+9.1= 10.1-0.24= 0.8÷10= 100×4= 0.9÷5= 8.4×100= 0.7×4= 3.25×8= 10.3×0.2= 2.01×3= 4.1-0.08= 3.5+5.2= 0.5-0.37= ÷0.9= ×2.3= +6.48= ÷0.5= ÷0.4= ÷0.4= ×10= -0.89= +0.18= ÷1000= -35.22= -0.52= ÷7= ×4= ×0= ×2= ×0= ×2= ×0.01= ×0.4 = 五年级上数学计算题
姓名:
得分:
下列各题怎样算简便就怎样算
13.6+4.28+6.4+5.72 147.3-28.4-71.6 139.46—(58.74+19.46)1.25×7×0.8 8.6÷4.5+18.4÷4.5 12.4÷0.25(24+9.6÷2.4)×0.5 3.83×4.56+3.83×5.44 5.6÷3.5(7.2-0.4)×25 3.65×10.1 2.5×0.32×1.25 6.136×86+86×3.864 53.4÷0.25÷0.4 101×5.3 7.3×4.6+5.4×7.3 7.4×0.99 8.5-0.24-1.76 3.75×0.5+6.25÷2 6.3×2.1-0.63 3.65÷2.5÷4 5.6÷35 0.35×201 1.3+0.69+0.7 12.3×99+12.3 0.38+9.6÷3.2×5.4 7.6-(3.05+2.6)6.3÷0.5÷2 270÷4.5 20-3.7-7.3 6.3+4.82+3.7-0.82 307×10.1 0.45×18 132-43.7-56.3 0.32×12.5×2.5 5.6×1.25 7.6×21-7.6 72÷1.25÷8 7.3+2.7-7.3+2.7(7.7+15.4)÷7 9.9×34 1.5×1.2+8.8×1.5 4.7×8.3+5.3×8.3 7.12×4-1.12×4 450÷2.5÷2 12.5×8.8(125-1.25)×0.8 3.5×0.4+3.5×0.6 39÷(1.3×5)2.2÷4+0.6÷4 4.83÷5+2.17÷5 42÷3.5 26.7-0.5×5-7.5 48.4+2.78+51.6-0.48 4.8+8.63+5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24 2.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+3.6+1.98 0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.5+4.9-6.5 3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55 3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 0.32×403 3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×36 12.7-(3.7+0.84)36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.6 0.85×199 0.25×8.5×4 1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.35 0.8×(4.3×1.25)3.12+3.12×99 28.6×101-28.6(4.23+6.17)×0.8 0.86×15.7-0.86×14.7 2.4×102 14-7.32-2.68 2.64+8.67+7.36+11.33 2.31×1.2×0.5(2.5-0.25)×0.4 9.16×1.5-0.5×9.16 3.6-3.6×0.5 4.5÷1.8 4.2÷3.5 930÷0.6÷5 63.4÷2.5÷0.4 4.9÷1.4 3.9÷(1.3×5)(7.7+1.54)÷0.7 2.5×2.4 2.7÷45 0.35×1.25×2×0.8 32.4×0.9+0.1×32.4 15÷0.25 70÷28 15÷(0.15×0.4)4.25÷2.5+0.17(1.25-0.125)×8 7.74×1.5+1.5×2.26 21×5.6-5.6 36.54-1.76-4.54 23.4-0.8-13.4-7.2 13.7×0.25-3.7÷4 4.9÷1.4 0.85×199 3.2×0.25×12.5 3.6×102 3.72×3.5+6.28×3.5 36.8-3.9-6.1 15.6×12.1-15.6×2.1 4.8×7.8+7.8×5.2 32+4.9-0.9 4.8×100.1 56.5×9.9+56.5 7.09×10.8-0.8×7.09 25.48-(9.4-0.52)4.2÷3.5 320÷1.25÷8 18.76×9.9+18.76 3.52÷2.5÷0.4 3.9-4.1+6.1-5.9 5.6÷3.5 9.6÷0.8÷0.4 4.2×99+4.2 17.8÷(1.78×4)0.49÷1.4 1.25×2.5×32 15.2÷0.25÷4 0.89×100.1 146.5-(23+46.5)3.83×4.56+3.83×5.44 4.36×12.5×8 9.7×99+9.7 27.5×3.7-7.5×3.7 8.54÷2.5÷0.4 0.65×101 12.4÷8÷0.125 5.6÷1.25÷0.8 8.9×1.01 3.9×2.7+3.9×7.3 1.8÷0.125÷0.8 12.7×9.9+12.7×0.1 21×5.6-5.6 15.02-6.8-1.02 5.4×11-5.4 2.3×16+2.3×23+2.3 9.43-(6.28-1.57)3.65×4.7-3.65×3.7 46×57+43×46 13.7×0.25-3.7÷4 0.79×199 101×0.87-91×0.87 10.7×16.1-15.1×10.7 0.79×199 4.8+8.63+5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24 2.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+3.6+1.98 0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.5+4.9-6.5 3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55 3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 0.32×403 3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×36 12.7-(3.7+0.84)36.54-1.76-4.54 0.25×0.73×4 7.6×0.8+0.2×7.6 0.85×199 0.25×8.5×4 1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.35 0.8×(4.3×1.25)3.12+3.12×99 28.6×101-28.6 0.86×15.7-0.86×14.7 2.4×102 2.31×1.2×0.5 14-7.32-2.68 2.64+8.67+7.36+11.33 70÷28(2.5-0.25)×0.4 9.16×1.5-0.5×9.16 3.6-3.6×0.5 4.5÷1.8 4.2÷3.5 930÷0.6÷5 63.4÷2.5÷0.4 4.9÷1.4 3.9÷(1.3×5)(7.7+1.4)÷0.7 2.5×2.4 15÷(0.15÷0.4)0.35×1.25×2×0.8 32.4×0.9+0.1×32.4 15÷0.25 4×9×0.25 0.25×36 2.7÷45 3.65×10.1 3.2×0.25×12.5 2.5×3.2×1.25 12.3×99+12.3 4.56-(2.56+1.25)4.56-(2.56-1.25)5.78+(2.47-1.78)6.87+(3.13+0.58)12.75+(2.19+7.25)3.79-(2.79+0.5)17.8÷(1.78×4)(2.5-0.25)×0.4 0.8×(4.3×1.25)15÷(0.15÷0.4)12.5×32×2.5(1.25-0.125)×8 5.45÷0.4÷0.25 7.5÷(7.5÷0.4)(7.7+1.4)÷0.7 12.5×8.8 2.5×44 3.65×10.1 3.9÷(1.3×5)3.45-8.7+16.55-1.3 2.5×4.4 45.55-(6.82+15.55)0.03×(1.34-0.84)10.9-3.74+0.9 3.6×10.1 1.25×1.7×0.8.54-5.98 2.5×0.32×1.25 39÷(0.5×3.9)3.5-(2-1.5)7.3×4.6+5.4×7.3 53.4÷0.25÷0.4 0.75+0.25÷0.1 0.45×18 3.6-3.6×0.8 42÷3.5(7.2-0.4)×25 4.7÷(4.7÷3.2)4.2÷(0.7+1.4)苏教版五年级上学期数学计算检测
一、直接写得数。
0.76-0.6= 3.6+4= 50+0.5= 10-0.01= 8.8÷2.2= 0.75×4= 500×0.01= 9-0.01 = 50÷0.5= 1.25×0.8= 1÷0.01= 7÷0.25= 0.72÷0.9= 0.25×40= 0.85+1.5= 2.4×5= 2.5×0.4÷2.5×0.4= 2.7+0.3-2.7+0.3= 0.92×0×1.7= 1.25×8= 2.6×3= 4.1×2= 0.35×0.2= 7.5×0.1= 0.9×0.3= 1×0.06= 9×0.5= 2÷5= 8.8+0.12= 9.7—0.97= 0.36×5= 0÷0.24= 1÷0.25= 0.36÷0.12= 0.2÷0.05= 2.5×4= 2.34+0.6= 6-1.84= 1.3×0.5= 0.2×5×1.7= 2.5×0.5÷2.5×0.5= 0.125×8= 7.5÷1.5= 0.81÷9= 3÷0.5= 10÷25= 4.8÷0.16= 0÷3.89= 3.52÷1= 1.8÷0.3= 0.3÷0.01= 4÷0.5= 5.1÷0.17= 0.28÷1.4= 0.9÷0.45= 9.6÷16= 1÷0.01 = 0.01÷1= 0.728-0.24= 0.8+0.18= 1-0.73= 0.6×8= 0.04×0.3= 0.4×2.5= 1.25×8= 1.6×5= 0.07÷10= 67÷1000= 3.4-1.4= 7.82-7.2= 2.19+9.1= 10.1-0.89= 0.68+0.42= 8.1-5.1= 3.05×10= 0.98×100= 12.7÷10= 1.05÷100= 1.2×0.4+0.4×1.3= 2.4×0.6÷2.4×0.6= 7.5+4.8-7.5+4.8= 0.4×0.02= 3.5+7.6= 1.23÷3= 2.4×2.5= 0.9÷0.01= 2.4×5= 0.24÷8= 6.3÷2.1= 0.75×2= 3.2-0.32= 85÷0.05= 7÷0.25= 0.7×0.9÷0.7×0.9 = 8.8-0.78÷0.1= 4×(1.5+0.25)= 48÷0.16 = 9-0.01 = 2.6 + 5.8 = 16÷1.6= 0.85+1.5= 9-0.09= 0.63÷9 = 99×0.25= 0.98-0.8 = 4.5 + 5 = 0.05÷0.1 = 0.125×16 = 0.2×0.3×0.1= 2.5×0.4÷2.5×0.4= 2.7÷3×2.7÷3= 0.4+0.4÷0.1= 8.2÷8.2+8.2= 0.1÷0.1+0.9= 0.1-0.1×0.1= 0.1×0.1+0.1= 0.1×0.1÷0.1= 4.8 + 2 = 0.25×40= 6.5-5.6= 1.25×0.8= 2.5+6.5= 1÷0.01= 10÷0.5= 2.4×5= 50×0.5= 503.5×0.2= 0.720.4÷0.01= 1.258.8÷2.2= 0.751-0.6= 40.76-0.6= 3.7+3= 2.5+8.5= 10-0.01= 8.8÷2.2= 0.7525×40= 5.23.6+4= 0.760.4÷0.01= 1.250.4÷0.01= 1.258.8÷2.2= 0.750.76-0.6= 3.62.5+8.5= 10-0.1= 0.50.46+0.34= 1-0.78= 2.70.25×0.7×4= 0.540.6+0.24= 0.58-0.4= 0.8+0.35= 0.8+0.3= 0.35+0.21= 12.30.57-0.5= 6.2+0.08= 8+1.04= 6.27.3+1.4= 3.9-2= 0.2+1.8= 1-0.35= 3.2÷0.4= 0.321÷0.02= 0.91.25×8= 0.23.9÷0.3= 0.24÷0.5= 9.8÷0.9= 1-0.01= 0.2×16= 3.4×4= 500÷8= 0.16×4= 500×5= 0.35-0.6= 2.5×16= 3.4×16= 3.4×4= 500+4= 50÷18= 0.025÷10= 2.3÷0.08= 0.7÷0.45= 28×0.4= 8.2÷2= 0.1÷0.01= 6.5×1.01= 3.2×0.01= 6.2÷1.6= 1×0.01= 6.2×4= 0.2+8.5= 10-0.01= ×1.01= 3.2×1.01= 3.2×0.01= 6.2+0.5= 10+0.7= 3.18×3= 9.3×4.4= 7.38-5.88= ÷10= 0.16÷0.01= 2.9÷0.4= 5.8-0.5= +1.8= 6.4×0.2= 1.4÷25= ÷0.01= ÷1.6= ×0.3= -0.81= ×0.3= ×2.4= ÷1.6= ÷1.6= ×0.3= -0.01= +2.02= ÷0.93= ×10= ÷3.1= ÷0.1= ÷0.8= ×3=
第四篇:五年级校庆数学计算竞赛题
古定小学2015年秋五年级校庆数学计算竞赛题
一. 口算。(每题1分)
85×60=
10.1+9.9=
2.5×0.4=
0.63÷9=
0.37+0.73=
1.25×8=
0.28+0.54=
0.2×0.2=
0.9-0.42=
101×6.3=
81.1+0.09=
0.32÷0.4=
20-0.75=
0.5×0.8=
4.5÷0.45=
4.2-4.2÷1=
0÷0.25×4=
5.87×0+5.87=
0.96÷0.6×5 =
7.5÷0.15=
4.6÷46=
二、竖式计算(除不尽的保留两位小数)(每题3分)6.64÷3.3
6.5÷0.27
27÷11
7.28÷9.2
14.2÷11
0.38×4.72
三、脱式计算,能简算的要简算。(每题4分)
45÷100×100=
5-2.7=
0.1-0.99=
9×3÷9×3= 49.7÷0.07
5.02×4.8
7÷28
63×10.1
6.5×0.25+0.75
1.25×32×2.5
16.8+14.7÷0.7
32.1-5.56-4.43
1.08×0.8÷0.27
93÷0.31÷3
2.7×99
8×4.6+3.5×8+1.9×8
7.2×19+7.2 78.5-13.8+6.2
0.8×(4-3.68)÷0.4
第五篇:五年级数学计算竞赛题1
五年级计算题竞赛试卷
分数
姓名
一、直接写得数(每小题1分,共8分)
2.1×0.3÷2.1=
1/2-1/3=
77÷7.7=
0.24÷0.3=
0.2×0.5=
3/4-2/3= 2.3-0÷8.1=
1.4×0.6=
二、竖式计算(每小题4分,共 16分)
9.792÷3.2=
23÷45=
53.73-17.49=
10.7×0.75=
三、脱式计算(每小题4分,共 16分)
9.8×[2.5-(0.95+1.3)]
(77.4-30.96÷0.4)÷0.033
0.34×[(144×0.8)÷(2.67+1.83)]
[(6-3.6)÷0.8-1.3]×0.09
四、简便计算(每小题3分,共24分)
5/2-(3/2 + 4/5)
5/7-1/6+2/7=
2.82+5.3×2.82+2.82×3.7
0.94×2.5+0.094×75
1.25×32×2.5
10.1×78
2.55×7.1+2..45×7.1
777×9+111×37
五、列式计算(每小题4分,共12分)82.5与0.4的积比7.5与4.95的差大多少?
3.6被0.23与3.37的和的2倍去除,商是多少?
6.25与3.75的和除这两个数的差,商是多少?
六、求下面每组数的最大公约数和最小公倍数。(每小题4分,共24分)45和60
36和60
42和105
27和72
76和80
36和48