6. 列竖式计算。
93-27
93
27
----
66
356×7
356
× 7
----
2492
673×4
673
× 4
----
2692
208×6
208
× 6
----
1248
750×4
750
× 4
----
3000
420×6
420
× 6
----
2520
412-87
412
87
----
325
372×3
372
× 3
----
1116
305×5
305
× 5
----
1525

```
93
27
----
66
356
× 7
----
2492
673
× 4
----
2692
208
× 6
----
1248
750
× 4
----
3000
420
× 6
----
2520
412
87
----
325
372
× 3
----
1116
305
× 5
----
1525
```

7. 脱式计算。
20×6+432
763-180+206
278+63÷7
137-48÷6
548+134+252
516-(682-318)
(341-320)÷7
8×9+2160
70×6-130

20×6+432
=120+432
=552
763-180+206
=583+206
=789
278+63÷7
=278+9
=287
137-48÷6
=137-8
=129
548+134+252
=682+252
=934
516-(682-318)
=516-364
=152
(341-320)÷7
=21÷7
=3
8×9+2160
=72+2160
=2232
70×6-130
=420-130
=290