题目内容
怎样简便怎样算.
4.52-0.74-0.26
×
+
÷
4.8×99+4.8
(2.5-2.5×60%)÷4
×3+
÷
-
×
.
4.52-0.74-0.26
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 5 |
4.8×99+4.8
(2.5-2.5×60%)÷4
| 2 |
| 15 |
| 13 |
| 15 |
| 1 |
| 3 |
| 2 |
| 7 |
| 6 |
| 13 |
| 2 |
| 7 |
(1)4.52-0.74-0.26,
=4.52-(0.74+0.26),
=4.52-1,
=3.52;
(2)
×
+
÷
,
=
×
+
×
,
=(
+
)×
,
=2×
,
=
;
(3)4.8×99+4.8,
=4.8×(99+1),
=4.8×100,
=480;
(4)(2.5-2.5×60%)÷4,
=[2.5×(1-0.6)]÷4,
=[2.5×0.4]÷4,
=1÷4,
=0.25;
(5)
×3+
÷
,
=
×3+
×3,
=(
+
)×3,
=1×3,
=3;
(6)
-
×
,
=
×(1-
),
=
×
,
=
.
=4.52-(0.74+0.26),
=4.52-1,
=3.52;
(2)
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 5 |
=
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 5 |
| 8 |
=(
| 7 |
| 4 |
| 1 |
| 4 |
| 5 |
| 8 |
=2×
| 5 |
| 8 |
=
| 5 |
| 4 |
(3)4.8×99+4.8,
=4.8×(99+1),
=4.8×100,
=480;
(4)(2.5-2.5×60%)÷4,
=[2.5×(1-0.6)]÷4,
=[2.5×0.4]÷4,
=1÷4,
=0.25;
(5)
| 2 |
| 15 |
| 13 |
| 15 |
| 1 |
| 3 |
=
| 2 |
| 15 |
| 13 |
| 15 |
=(
| 2 |
| 15 |
| 13 |
| 15 |
=1×3,
=3;
(6)
| 2 |
| 7 |
| 6 |
| 13 |
| 2 |
| 7 |
=
| 2 |
| 7 |
| 6 |
| 13 |
=
| 2 |
| 7 |
| 7 |
| 13 |
=
| 2 |
| 13 |
练习册系列答案
相关题目