题目内容
2×8-2○8=6,在○里填上“+、-、× 、÷”,使等式成立.正确的是
[
]|
A .+ |
B .- |
|
C .× |
D .÷ |
答案:B
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先观察,再计算.
|
(1)5 ×3+5= |
5 ×4= |
|
(2)7 ×3+3= |
8 ×3= |
|
(3)4 ×6+6= |
5 ×6= |
|
(4)2 ×5-2= |
2 ×4= |
|
(5)9 ×4+9= |
( )×( )= |
|
(6)7 ×5-7= |
( )×( )= |
|
(7)3 ×7+3= |
( )×( )= |
|
(8)6 ×1+6= |
( )×( )= |
先观察,再计算.
|
(1)5 ×3+5= |
5 ×4= |
|
(2)7 ×3+3= |
8 ×3= |
|
(3)4 ×6+6= |
5 ×6= |
|
(4)2 ×5-2= |
2 ×4= |
|
(5)9 ×4+9= |
( )×( )= |
|
(6)7 ×5-7= |
( )×( )= |
|
(7)3 ×7+3= |
( )×( )= |
|
(8)6 ×1+6= |
( )×( )= |
口算.
|
(1)8 ×5= |
(2)18 ÷2= |
|
(3)12 ÷3= |
(4)21 ÷7= |
|
(5)2 ×8= |
(6)36 ÷4= |
口算.
|
(1)8 ×5= |
(2)18 ÷2= |
|
(3)12 ÷3= |
(4)21 ÷7= |
|
(5)2 ×8= |
(6)36 ÷4= |