Question

直接寫出得數(shù)

3 4 + 1 4 =	5 6 - 1 6 =	2+ 4 9 =	1- 7 12 =
3 4 - 1 2 =	2 3 + 1 5 =	1 3 + 1 5 =	1 2 - 1 3 =
3 10 + 1 5 =	1 6 + 1 2 - 1 6 =	2- 1 6 - 5 6 =	4 5 - 1 8 + 1 5 =

Answer 1

考點：分?jǐn)?shù)的加法和減法

專題：運算順序及法則

分析：根據(jù)分?jǐn)?shù)加、減法的計算法則，直接進(jìn)行口算即可．2-

1

6

-

5

6

根據(jù)減法的運算性質(zhì)簡算．

解答： 解：

3 4 + 1 4 =1	5 6 - 1 6 = 2 3	2+ 4 9 =2 4 9	1- 7 12 = 5 12
3 4 - 1 2 = 1 4	2 3 + 1 5 = 13 15	1 3 + 1 5 = 8 15	1 2 - 1 3 = 1 6
3 10 + 1 5 = 1 2	1 6 + 1 2 - 1 6 = 1 2	2- 1 6 - 5 6 =1	4 5 - 1 8 + 1 5 = 7 8 ．

點評：此題考查的目的是理解掌握分?jǐn)?shù)加、減法的計算法則，并且能夠正確熟練地進(jìn)行口算，提高口算能力．