因数 |
1 |
2 |
4 |
3 |
7 |
8 |
因数 |
6 |
5 |
5 |
8 |
1 |
8 |
积 |
________ |
________ |
________ |
________ |
________ |
________ |
8×2________20 7×6________6×7
0+5________3 4×5________4×6