(1)1357+450÷18×25
(2)13.7-26.4÷(2.6+1.4)
(3)3.6×[2÷(
| 4 |
| 5 |
(4)4-[1-(
| 3 |
| 5 |
| 1 |
| 4 |
| 3 |
| 17 |
=1357+25×25,
=1357+625,
=1982;
(2)13.7-26.4÷(2.6+1.4),
=13.7-26.4÷4,
=13.7-6.6,
=7.1;
(3)3.6×[2÷(
| 4 |
| 5 |
=3.6×[2÷0.2],
=3.6×10,
=36;
(4)4-[1-(
| 3 |
| 5 |
| 1 |
| 4 |
| 3 |
| 17 |
=4-[1-
| 17 |
| 20 |
| 3 |
| 17 |
=4-
| 3 |
| 20 |
| 3 |
| 17 |
=4-
| 17 |
| 20 |
=3
| 3 |
| 20 |