题目内容
用递等式计算.
360÷15-2.5×1.6
÷
-
×6
(1-
×
)÷
.
360÷15-2.5×1.6
| 8 |
| 15 |
| 1 |
| 6 |
| 7 |
| 15 |
(1-
| 3 |
| 4 |
| 2 |
| 5 |
| 7 |
| 8 |
(1)360÷15-2.5×1.6,
=24-2.5×4×0.4,
=24-10×0.4,
=24-4,
=20;
(2)
÷
-
×6,
=
×6-
×6
=(
-
)×6,
=
×6,
=
;
(3)(1-
×
)÷
,
=(1-
)÷
,
=
×
,
=
.
=24-2.5×4×0.4,
=24-10×0.4,
=24-4,
=20;
(2)
| 8 |
| 15 |
| 1 |
| 6 |
| 7 |
| 15 |
=
| 8 |
| 15 |
| 7 |
| 15 |
=(
| 8 |
| 15 |
| 7 |
| 15 |
=
| 1 |
| 15 |
=
| 3 |
| 5 |
(3)(1-
| 3 |
| 4 |
| 2 |
| 5 |
| 7 |
| 8 |
=(1-
| 3 |
| 10 |
| 7 |
| 8 |
=
| 7 |
| 10 |
| 8 |
| 7 |
=
| 4 |
| 5 |
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