Question

寫出計算過程

15× 5 6	7 8 ×56	4 13 × 5 12	5 6 × 12 25	10 21 × 3 5
42 55 × 11 35	2 3 × 3 14	3 8 × 4 15	25 26 × 13 15	13 63 × 14 39
5 8 + 2 5	5 8 - 2 5	5 8 × 2 5	25 36 × 27 40	51× 3 17
11 35 ×25	24× 5 18	2 15 × 5 8	14 39 × 13 28	32 45 × 15 28 ．

Answer 1

考點：分數乘法

專題：計算題

分析：本題根據分數乘法、及加法的運算法則計算即可．

解答： 解：

15× 5 6 = 25 3	7 8 ×56=49	4 13 × 5 12 = 5 39	5 6 × 12 25 = 2 5	10 21 × 3 5 = 2 7
42 55 × 11 35 = 7 25	2 3 × 3 14 = 1 7	3 8 × 4 15 = 1 10	25 26 × 13 15 = 5 6	13 63 × 14 39 = 2 27
5 8 + 2 5 = 41 40	5 8 - 2 5 = 9 40	5 8 × 2 5 = 1 4	25 36 × 27 40 = 15 32	51× 3 17 =9
11 35 ×25= 55 7	24× 5 18 = 20 3	2 15 × 5 8 = 1 12	14 39 × 13 28 = 1 6	32 45 × 15 28 = 8 21 ．

點評：完成本題要注意約分，在保證做題質量的同時，要注意提高做題的速度．