| 5 |
| 7 |
| 2 |
| 7 |
=0.233-0.133+
| 5 |
| 7 |
| 2 |
| 7 |
=(0.233-0.133)+(
| 5 |
| 7 |
| 2 |
| 7 |
=0.1+1,
=1.1;
(2)4.62+9.9+5.38+0.1,
=(4.62+5.38)+(0.1+9.9),
=10+10,
=20;
(3)4×0.6+0.6÷
| 1 |
| 4 |
=4×0.6+0.6×4,
=0.6×(4+4),
=0.6×8,
=4.8;
(4)0.38×7-
| 19 |
| 50 |
| 19 |
| 50 |
=
| 19 |
| 50 |
| 19 |
| 50 |
| 19 |
| 50 |
=
| 19 |
| 50 |
=
| 19 |
| 50 |
=
| 19 |
| 5 |
(5)36×(
| 4 |
| 9 |
| 5 |
| 12 |
=36×
| 4 |
| 9 |
| 5 |
| 12 |
=16-15+15,
=16;
(6)(
| 1 |
| 19 |
| 1 |
| 23 |
=
| 1 |
| 19 |
| 1 |
| 23 |
=23+19,
=42.
