=132.3-100
=32.3;
(2)15.8-
| 7 |
| 18 |
| 11 |
| 18 |
=(15.8+14.2)-(
| 7 |
| 18 |
| 11 |
| 18 |
=30-1
=29;
(3)21.6-0.8×4÷0.8×4
=21.6-3.2÷0.8×4
=21.6-4×4
=21.6-16
=5.6;
(4)3
| 3 |
| 5 |
| 3 |
| 5 |
=3
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
=3
| 3 |
| 5 |
=3
| 3 |
| 5 |
=36;
(5)2.5×4.4
=2.5×(4+0.4)
=2.5×4+2.5×0.4
=10+1
=11;
(6)(1.5+2
| 2 |
| 3 |
| 2 |
| 3 |
=
| 25 |
| 6 |
| 2 |
| 3 |
=
| 25 |
| 6 |
| 4 |
| 15 |
| 2 |
| 3 |
=
| 10 |
| 9 |
| 2 |
| 3 |
=
| 4 |
| 9 |
