=4000-108×5,
=4000-540,
=3460;
(2)3.68-3.6×0.2+0.18,
=3.68+0.18-0.72,
=3.86-0.72,
=3.14;
(3)48×9.9+48×0.1,
=48×(9.9+0.1),
=48×10,
=48;
(4)(1-
| 3 |
| 4 |
=
| 1 |
| 4 |
| 1 |
| 4 |
=1×4,
=4;
(5)(6-6×
| 2 |
| 3 |
=(6-4)÷12,
=2÷12,
=
| 1 |
| 6 |
(6)2÷[
| 7 |
| 12 |
| 5 |
| 6 |
| 5 |
| 12 |
=2÷[
| 7 |
| 12 |
| 10 |
| 12 |
| 5 |
| 12 |
=2÷[
| 7 |
| 12 |
| 5 |
| 12 |
=2÷1,
=2.
