题目内容
| 合理灵活的计算. (
| 5.5×36+55×6.4 | [
| (
|
(1)(
+
-
)÷
,
=(
+
-
)×36
=
×36+
×36-
×36,
=24+9-15,
=18;
(2)5.5×36+55×6.4,
=5.5×36+5.5×64,
=(36+64)×5.5,
=100×5.5,
=550;
(3)[
-(
+
)]÷
,
=[
-
]÷
,
=
×5,
=
;
(4)(
-
)÷
×
,
=
×
×
,
=
.
| 2 |
| 3 |
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 36 |
=(
| 2 |
| 3 |
| 1 |
| 4 |
| 5 |
| 12 |
=
| 2 |
| 3 |
| 1 |
| 4 |
| 5 |
| 12 |
=24+9-15,
=18;
(2)5.5×36+55×6.4,
=5.5×36+5.5×64,
=(36+64)×5.5,
=100×5.5,
=550;
(3)[
| 7 |
| 8 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 5 |
=[
| 7 |
| 8 |
| 6 |
| 8 |
| 1 |
| 5 |
=
| 1 |
| 8 |
=
| 5 |
| 8 |
(4)(
| 3 |
| 5 |
| 1 |
| 3 |
| 2 |
| 3 |
| 7 |
| 8 |
=
| 4 |
| 15 |
| 3 |
| 2 |
| 7 |
| 8 |
=
| 7 |
| 20 |
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