小学五年级数学计算能力竞赛试题(附答案)
另类游戏名字-楚门的世界英语影评
小学五年级数学计算能力竞赛试题
（时间：60分钟 总分100分）
一、 口算（每题0.5分，共20分）
0.8×0.5=0.4
1.25×4=5 4.3×3=12.9 24÷30=0.8
3.7-2.5=1.2 2.2×0.6=1.32 0.75+0.25=1
17÷100=0.17
2.8×4=11.2 0.15÷0.3=0.5
20-0.2=19.8 2.5×0.4=1
5.5+55=60.5
5.6÷0.2=28 1÷0.01=100 3.5×0.6=2.1
10.8÷9=1.2 0.95-0.36=0.59 0.13×4=0.52
84÷4.2=20
2.26-0.6=1.66 0.63+0.47=1.1
0.87÷0.3=2.9 100÷12.5=8
5.2×4=20.8
0.25×40=10 1.69÷1.3=1.3 6.5+0.35=6.85
1.44÷1.2=1.2 20-14.2=5.8 3.5×0.4=1.4
2.5×2.4=6
9.1÷7=1.3 0.72÷0.6=1.2
2.3×0.6=1.38 11-1.1=9.9
9÷2.5÷4=0.9
4.5×6×0.2=5.4
1.7+0.3-1.7+0.3=0.6
2.3×0.2÷2.3×0.2=0.04
二、计算下面各题。（每题2分，共30分）
15.4+5.6÷7 12.3×3.1-25.9
(16.7-1.4)÷3
=15.4+0.8 =38.13-25.9
=15.3÷3
=16.2 =12.23
=5.1
2.3-1.5+4.5×4
5.6÷0.8-1.9×3 18-（0.6+2.4×5）
=0.8+18
=7-5.7 =18-(0.6+12)
=18.8
=1.3 =18-12.6
=5.4
（0.24÷0.3+5）×1.5
(5-0.68)÷1.2+0.8 （80－9.8）×0.6－2.21
=(0.8+5) ×1.5 =4.32÷1.2+0.8
=70.2×0.6－2.21
=5.8 ×1.5
=3.6+0.8 =42.12-2.21
=8.7
=4.4 =39.91
(12.5-3.6×2.5)÷2
[18.95－（8.43+3.87）] ×2.8
=(12.5-9)÷2
= [18.95－12.3] ×2.8
=3.5÷2
=6.65×2.8
=1.75
=18.62
（41-37.4）×（0.9+6.2）
1.7×[34.8÷(4.3+1.7)]
=3.6×7.1
=1.7×[34.8÷6]
=25.56
=1.7×5.8
=9.86
1.25÷[(12-9.5)×0.2]
(1.9-1.9×0.9)÷(3.8-2.8)
=1.25÷[2.5×0.2]
= (1.9-1.71)÷1
=1.25÷0.5
= 0.19÷1
=2.5
= 0.19
三、用简便方法计算(2，共30分)
2.65+8.63+7.35+11.37 8.5-0.26-1.74
1.8×10.1
=(2.65+7.35)+(8.63+11.37)
=8.5-(0.26+1.74) =1.8×(10+0.1)
=10+20
=8.5-2 =1.8×10+1.8×0.1
30
=6.5 =18.18
3.34+6.17-1.34+3.83 1.25×3.2×2.5
930÷0.6÷5
=3.34-1.34+(6.17+3.83)
=(1.25×8)×(0.4×2.5) =930÷(0.6×5)
=2+10
=10×1 =930÷3
=12
=10 =310
0.875×101-0.875 23.4-0.8-13.4-7.2
1.25×88
=0.875×(101-1)
=23.4-13.4-(0.8+7.2) =1.25×8×11
=0.875×100
=10+8 =10×11
=87.5
=18 =110
18.74×0.18+1.26×0.18
1.9×2.3+1.9×2.7-1.9
=(18.74+1.26) ×0.18
=1.9×(2.3+2.7-1)
=20×0.18
=1.9×4
=3.6
=7.6
0.87×60+87×0.5-8.7
0.9999×0.7＋0.1111×3.7
=8.7×6+8.7×5-8.7
=0.1111×(9×0.7)＋0.1111×3.7
=8.7×(6+5-1)
=0.1111×6.3＋0.1111×3.7
=8.7×10
=0.1111×10
=87
=1.111
0.9+0.99+0.999+0.9999
9595×96-9696×95
=4-0.1-0.01-0.001-0.0001
=101×95×96-101×96×95
=4-0.1111
=0
=3.8889
四、解决下列问题（20分）
1.
在□填上合适的数字。（每题3分，共6分）
2.在□内填上适当的数，使等式成立。（3分）
73.06－[□×(4.465+5.535)+42.06]=3 2.8
3.计算下列两题。（每题4分，共8分）
1＋0.99－0.98－0.97＋0.96＋
0.95－0.94－0.93＋…＋0.04＋0.03－0.02
－0.01
=(1-0.98)+(0.99-0.97)+(0.96-0.94)+(0.95-0.93)+……(0
.04-0.02)+(0.03-
0.01)
=0.02×50
=1
（1＋0.12＋0.23）×（0.12＋0.23＋0.34）－（1＋0.
12＋0.23＋0.34）×（0.12
＋0.23）
设1+0.12+0.23=A，0.12+0.23=B
原式=A×(B+0.34)-(A+0.34) ×B
=AB+0.34A-AB-0.34B
=0.34A-0.34B
=0.34(A-B)
=0.34×1
=0.34
4.小灵在计算除
法时，把除数16错写了19，结果得到的商是17还余13，你能
算出它的正确结果吗？（3分）
(19×17+13)÷16
=336÷16
=21