小学五年级数学易错口算题.doc

在括号里填上 > < 或 =
0.8 × 8.2 ( ) 8.2 72.5 ÷ 5.8 ( ) 1
98.7 ÷ 0.65 ( ) 98.7 7.4 × 1.2 ( ) 7.4
1.8 ÷ 5.8 ( ) 1 3.76 ÷ 5.8 ( ) 3.76
2.8 × 8.2 ( ) 8.2 0.03 ÷ 0.1 ( ) 1
19.3 ÷ 5.8 ( ) 1 3.4 × 11.2 ( ) 11.2
16.2 × 0.9 ( ) 16.2 3.8 ÷ 2.7 ( ) 1
91÷ 5.8 ( ) 91 0.02 × 1.9 ( ) 1.9
12.5 × 0.7 ( ) 12.5 0.05 ÷ 0.07 ( ) 1
1.3 ÷ 2.1 ( ) 1 8.4 × 4.8 ( ) 8.4
1.6 × 18.4 ( ) 18.4 1.5 ÷ 3.1 ( ) 1
0.03 × 10.4 ( ) 0.03 0.86 ÷ 0.31 ( )0.86
25 ÷ 34.3 ( ) 1 0.7 × 11.4 ( ) 11.4
32.8 × 1.4 ( ) 32.8 78 ÷ 4.3 ( ) 78
0.6 ÷ 0.31 ( ) 1 0.8 × 2.4 ( ) 2.4
0.9 ÷ 1.4 ( ) 1.9 ÷ 1.4 9.7 ÷ 0.34 ( ) 9.7 × 0.34
8.6 × 1.4 ( ) 8.2 ÷ 1.4 98 ÷ 0.34 ( ) 99 ÷ 0.34
67 × 1.4 ( ) 3.6× 1.4 0.9 × 1.4 ( ) 0.9 ÷ 1.4
1.9 ÷ 3 ( ) 1.9 ÷ 0.4 67 × 1.4 ( ) 67× 4.1
3.4 × 0.87 ( ) 0.87 9.9 × 0.86 ( ) 0.86
0.98 × 1.4 ( ) 1.4 9.4 × 1.2 ( ) 1.2
0.99 × 0.87 ( ) 1 1.6 × 1.07 ( ) 1
2.11 × 0.99 ( ) 0.99 2.4 × 3.5 ( ) 0.24 × 35
6.7 × 2.5 ( ) 0.67 × 2.5 12.7 × 20.5 ( ) 127 × 0.205在括号里填上适当的数
67.9 × 0.06 = 6.79 × ( ) 7.5 ÷ 0.06 = 750 ÷ ( )
0.069 ÷ ( ) = 69 ÷ 5 87.34 × 1.57 = ( ) × 15.7
37.3 ÷ 0.06 = 3.73 ÷ ( ) 29.8 ÷ 0.06 = ( ) ÷ 60
0.09 × 7.29 = 90 × ( ) ( ) × 271.7 = 4.63 × 2717
( ) × 7.29 = 90 × 729 168 ÷ 0.06 = 0.168 ÷ ( )
计算
6.78 × 12.1 + 2.2 × 6.78 + 6.78 × 5.7
=
9.2 × 8.1 – 1.1 × 9.2 + 3 × 9.2
=
125 × 19.1 – 125 × 5.1 - 6 × 125
=
125 × 2.1 + 12 × 12.5 + 1.25 × 470
=
9.876 × 2.1 + 98.76 × 0.79
=
3.274 × 18.5 – 327.4 × 0.085
=
125 × 21.1 - 125–10.1 ×125
=
68.23 × 100.1 19.87 × 99.9
= =
125 × 88.08 25 × 40.04
= =
比较A、B、C大小
A × 0.9 = B ÷0.9 = C × 0.2
A × 0.2 = B ×1.3 = C × 2
A ÷ 1.9 = B ÷0.9 = C ÷ 0.2
2 × A = 0.9 × B = 20 × C
1.9 ÷ A = 3.8 ÷ B = 0.5 ÷ C
口算
30 × 0.7 = 21.4 × 5 = 3 × 91 = 4.3 × 0.2 =
80 × 3.1 = 12.3 ×0.3 = 8.3 × 0.2 = 7.81 × 3 =
6.08 × 0.6 = 3 × 7.81 = 0.6 × 6.08 = 1.5 × 4 =
1.2 × 5 = 3.1 × 0.5 + 0.2 = 7-2 × 4 =
7-1.5 × 4 = 8.4 × 0.6 = 9.3 × 0.3 =
13.8 - 1.9 - 0.1 = 56.2 × 0.6 + 0.4 ×56.2 =
98.35 × 0.6 + 4 ×9.835 = 3.7 × 0.06 =
0.5 × 3.61 × 2 = 9.1 × 101 – 9.1 =
2.5 × 8.69 × 4 = 0.35 × 98 – 0.7 =
0.12 ÷ 2 = 12 ÷ 24 = 0.92 ÷ 4.6 = 0.3 ÷ 0.06 =
3.6 ÷ 0.9 = 0.3 ÷ 0.15 = 77 ÷ 0.7 = 14.7 ÷ 70 =
75.6 ÷ 90 = 0.63 ÷ 30 = 6300 ÷ 0.03 = 3 ÷ 0.3 =
8.2 ÷ 0.01 = 3.2 ÷ 1.6 - 0.6 = 3.8 ÷ 0.0001 =
10 - 0.6 ÷ 0.1 = 2.14 ÷ 2 + 0.03 = 6.67 ÷ 2.89 × 2.89 =
500 ÷ 25 × 4 = 3.5 ÷ 0.8 × 0.8 = 2400 ÷ 25 ÷ 4 =
68 ÷ 1.25 ÷ 0.8 = 629 ÷ 25÷ 4 = 94 ÷ 2.3 – 48 ÷ 2.3 =
1.5 × 7 + 8.5 × 7 = 7.8 + 7.8 ÷ 7.8 = 3.62 × 2.9 ÷ 3.62 =
3.8 ÷ 4 + 5 ÷ 4 = 760 ÷ 8 - 600 ÷ 8 =
60 ÷ 4 + 60 ÷ 2 = 90 ÷ 4 + 90 ÷ 5 =
1.75 ÷ 80 + 2.25 ÷ 80 = 1.6 + 2.4 × 3 = 9.9 × 2.7 + 0.27 =
27.8 × 2.5 ÷ 27.8 = 1.25 × 5.4 × 0.8 = 7 ÷ 0.5 × 2 =
10 ÷ 1.25 × 8 = 2.6 × 21 - 2.6 × 20 =
8.4 ÷ 21 – 8.4 ÷ 20 = 80 × 125.125 =
6.4 × 8 ÷ 3.2 = 7.42 + 8.29 - 3.42 =
(9.2 + 1.6 ) × 2 ÷2 = 4.98 × 11 ÷ 11 =
3.19 × 101 – 3.19 = 0.25 × 9 – 0.25 × 5 =
7.5 – 1.5 ÷ 3 = 13.4 × 0.4 ÷ 13.4 × 0.4 =
a × a = 1 × x × y = 1 × x = 2.5 × (a × 4 ) =
y × 5 – 4y = 6m – 3m -2m = 20 – 5a – 3a =
2n – 1.5 + n =
解方程
800 x = 40 x–9 × 2 = 30 3 + 5x = 8