六年级数学计算竞赛试卷
姓名 班级 座号 成绩
一、直接写出得数。(每题 1 分,共 20 分)
1800-799= 0.36+0.4= 1.5÷0.1=
5
1 ×
3
2 =
0.75÷
20
3 = 4.8×
8
3 = 10.5×
5
4 =
4
3 -
8
3 =
9÷
9
1 = 12×
20
1 =
5
2 + 3
1 = 10
7 -
5
3 =
3.6÷0.06=
75
8 ×
64
15 =
12
5 ×
10
3 =
5
4 ÷
15
8 =
41
9 ×21×
9
2 = (
8
1 +
2
1 )×0.8=
6.4+9.6-12= 0.3×0.3÷0.3×0.3=
二、能简便计算的要简便计算。(每题 7 分,共 70 分)
(1)900-576÷18×5 (2)32×25×1.25
(3)7.25-
7
3 +3.75-
7
4 (4)(1
4
+1
6
+ 5
12
)×36
(5)(4.8×
6
1 +4.8×
6
5 )÷
3
1 (6)(2-
4
3 ×
5
4 )÷(
12
1 +
15
4 )
(7)0.9 -(0.15 + 0.35÷
7
5 ) (8)7.8×2.5+78×0.75
(9)2.4×[
5
4 ÷(3.2-2.4×
12
4 )] (10)(
14
3
7
3- )×(
5
1
3
1+ )×
6
5
三、解下列方程。(共 5 分,每题 10 分)
4x-7×1.3=9.9 (
2
1 ÷0.4)X =1.35