题目内容
怎样简便就怎样算.
(1)8470-104×65 (2)1.3-3.79+9.7-6.21
(3)3.64÷4+4.36×0.25(4)(
-
)×4×9
(5)
÷[
×(0.4+
)].
(1)8470-104×65 (2)1.3-3.79+9.7-6.21
(3)3.64÷4+4.36×0.25(4)(
| 1 |
| 9 |
| 1 |
| 12 |
(5)
| 9 |
| 20 |
| 3 |
| 2 |
| 4 |
| 5 |
(1)8470-104×65
=8470-6760
=1710;
(2)1.3-3.79+9.7-6.21
=1.3+9.7-(3.79+6.21)
=11-10
=1;
(3)3.64÷4+4.36×0.25
=3.64×0.25+4.36×0.25
=(3.64+4.36)×0.25
=8×0.25
=2;
(4)(
-
)×4×9
=(
-
)×36
=
×36-
×36
=4-3
=1;
(5)
÷[
×(0.4+
)]
=
÷[
×(
+
)]
=
÷[
×
]
=
÷
=
;
故答案为1710;1;2;1;
.
=8470-6760
=1710;
(2)1.3-3.79+9.7-6.21
=1.3+9.7-(3.79+6.21)
=11-10
=1;
(3)3.64÷4+4.36×0.25
=3.64×0.25+4.36×0.25
=(3.64+4.36)×0.25
=8×0.25
=2;
(4)(
| 1 |
| 9 |
| 1 |
| 12 |
=(
| 1 |
| 9 |
| 1 |
| 12 |
=
| 1 |
| 9 |
| 1 |
| 12 |
=4-3
=1;
(5)
| 9 |
| 20 |
| 3 |
| 2 |
| 4 |
| 5 |
=
| 9 |
| 20 |
| 3 |
| 2 |
| 2 |
| 5 |
| 4 |
| 5 |
=
| 9 |
| 20 |
| 3 |
| 2 |
| 6 |
| 5 |
=
| 9 |
| 20 |
| 9 |
| 5 |
=
| 1 |
| 4 |
故答案为1710;1;2;1;
| 1 |
| 4 |
练习册系列答案
相关题目