Question

直接寫得數(shù)： 1 6 ÷ 1 3 =	1÷ 8 9 =	16 15 ÷48=	7× 7 8 =
6 7 ÷ 7 6 =	4 5 - 8 15 =	18 13 × 1 9 =	3 4 + 4 25 =

Answer 1

分析：根據(jù)分?jǐn)?shù)四則運算的法則計算得解，即除以一個數(shù)，就等于乘這個數(shù)的倒數(shù)；整數(shù)和分?jǐn)?shù)相乘，把整數(shù)和分子相乘的積做分子，分母不變；同分母分?jǐn)?shù)相加減，分母不變，只把分子相加減，異分母分?jǐn)?shù)相加減，先化成同分母分?jǐn)?shù)，再加減；要注意結(jié)果都要化成最簡分?jǐn)?shù)．

解答：解：

1 6 ÷ 1 3 = 1 2	1÷ 8 9 = 9 8	16 15 ÷48= 1 45	7× 7 8 = 49 8
6 7 ÷ 7 6 = 36 49 4 15	4 5 - 8 15 = 4 15	18 13 × 1 9 = 2 13	3 4 + 4 25 = 91 100

點評：此題主要考查分?jǐn)?shù)四則運算的法則的掌握和熟練應(yīng)用．