125×25×32=
4.9×5
| 1 |
| 2 |
| 1 |
| 2 |
29×
| 17 |
| 28 |
(0.12×40+13×0.4)-
| 3 |
| 4 |
=125×25×(4×8),
=(125×8)×(25×4),
=1000×100,
=100000;
(2)4.9×5
| 1 |
| 2 |
| 1 |
| 2 |
=4.9×(5
| 1 |
| 2 |
| 1 |
| 2 |
=4.9×10,
=49;
(3)29×
| 17 |
| 28 |
=(28+1)×
| 17 |
| 28 |
=
| 17 |
| 28 |
| 17 |
| 28 |
=17+
| 17 |
| 28 |
=17
| 17 |
| 28 |
(4)(0.12×40+13×0.4)-
| 3 |
| 4 |
=(12+13)×0.4-
| 3 |
| 4 |
=10-0.75-25,
=-15.75.