速算巧算.
|
(1)4500 +500= |
5000 +4000= |
10000 -4000= |
|
(2)500 +1400= |
5500 -5000= |
7900 -7000= |
速算巧算.
|
(1)3000 +4000= |
9200 -200= |
6700 -6000= |
|
(2)7300 -300= |
4200 +4000= |
5600 -600= |
|
(3)2000 +7000= |
1000 +9000= |
8400 -8000= |
口算.
|
(1)54 ÷6÷3= |
2 ×4×5= |
72 ÷9÷8= |
|
(2)4 ×6÷3= |
36 ÷4×8= |
42 ÷7+14= |
口算.
|
(1)24 +6= |
9 ×3= |
6 ×5= |
72 -4= |
|
(2)38 -8= |
36 ÷4= |
56 ÷7= |
4 ×9= |
口算.
|
(1)81 ÷9= |
24 +6= |
5 ÷1= |
12 ÷6= |
|
(2)8 ÷2= |
6 ×6= |
27 -9= |
64 ÷8= |
口算.
|
(1)7 ×8= |
2 ×6= |
18 ÷3= |
14 +7= |
|
(2)45 ÷5= |
8 ×4= |
63 ÷9= |
8 ×6= |