Question

直接寫得數． 4.5+5.5=	9.3-2.7=	10-0.06=	8.4÷0.7=
45× 5 9 =	3 4 × 5 2 =	1 9 ×18=	21÷ 3 7 =
10 11 × 2 5	2-35%=	3 4 - 2 5 =	6÷8=
14 15 ÷ 5 9	32=	2- 3 5 =	1÷10%=
38.9-9.8=	1 8 ÷ 1 4 =	6× 11 12 =	1 2 ÷ 1 2 =

Answer 1

考點：分數乘法,分數除法,小數的加法和減法

專題：運算順序及法則

分析：根據小數、分數和百分數加減乘除法的計算方法進行計算．

解答： 解：

4.5+5.5=10	9.3-2.7=6.6	10-0.06=9.94	8.4÷0.7=12
45× 5 9 =25	3 4 × 5 2 = 15 8	1 9 ×18=2	21÷ 3 7 =49
10 11 × 2 5 = 4 11	2-35%=1.65	3 4 - 2 5 = 7 20	6÷8= 3 4
14 15 ÷ 5 9 = 42 25	32=9	2- 3 5 =1 2 5	1÷10%=10
38.9-9.8=29.1	1 8 ÷ 1 4 = 1 2	6× 11 12 = 11 2	1 2 ÷ 1 2 =1

點評：口算時，注意運算符號和數據，然后再進一步計算．