3 |
10 |
1 |
4 |
4 |
5 |
=
11 |
20 |
4 |
5 |
=
11 |
25 |
答:是
11 |
25 |
②60÷
2 |
3 |
7 |
9 |
=90×
7 |
9 |
=70.
答:这个数的
7 |
9 |
③56÷(4+7)×4
=56÷11×4
=
56 |
11 |
=
224 |
11 |
56÷(4+7)×7
=56÷11×7
=
56 |
11 |
=
392 |
11 |
答:甲是
224 |
11 |
392 |
11 |
④20×
5 |
4 |
14 |
15 |
=25÷
14 |
15 |
=
375 |
14 |
答:甲数是
375 |
14 |
3 |
10 |
1 |
4 |
4 |
5 |
2 |
3 |
7 |
9 |
14 |
15 |
5 |
4 |
3 |
10 |
1 |
4 |
4 |
5 |
11 |
20 |
4 |
5 |
11 |
25 |
11 |
25 |
2 |
3 |
7 |
9 |
7 |
9 |
7 |
9 |
56 |
11 |
224 |
11 |
56 |
11 |
392 |
11 |
224 |
11 |
392 |
11 |
5 |
4 |
14 |
15 |
14 |
15 |
375 |
14 |
375 |
14 |