| 4000-3456÷32×5 | 3.68-3.6×0.2+0.18 | 48×9.9+48×0.1 | ||||||||||
(1-
| 45×
| 2÷[
|
=4000-108×5,
=4000-540,
=3460;
(2)3.68-3.6×0.2+0.18,
=3.68-0.72+0.18,
=2.96+0.18,
=3.14;
(3)48×9.9+48×0.1,
=48×(9.9+0.1),
=48×10,
=480;
(4)(1-
| 3 |
| 4 |
=
| 1 |
| 4 |
=1×4,
=4;
(5)45×
| 1 |
| 4 |
=(45+54+1)×0.25,
=100×0.25,
=25;
(6)2÷[
| 7 |
| 12 |
| 5 |
| 6 |
| 5 |
| 12 |
=2÷[
| 7 |
| 12 |
| 5 |
| 6 |
| 5 |
| 12 |
=2÷[
| 7 |
| 12 |
| 5 |
| 12 |
| 5 |
| 6 |
=2÷[
| 1 |
| 6 |
| 5 |
| 6 |
=2÷1,
=2.