题目内容
怎样简便就怎样算. 7×(
|
| 0.32×6.7+3.2×0.33 |
|
(1)7×(
+
)×8,
=7×8×
+7×8×
,
=16+21,
=37;
(2)
÷9+
÷
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(3)0.32×6.7+3.2×0.33,
=3.2×0.67+3.2×0.33,
=(0.67+0.33)×3.2,
=1×3.2,
=3.2;
(4)
×[
-(
+
)],
=
×[
-
-
],
=
×[
-
],
=
×
,
=
.
2 |
7 |
3 |
8 |
=7×8×
2 |
7 |
3 |
8 |
=16+21,
=37;
(2)
1 |
5 |
1 |
5 |
9 |
8 |
=
1 |
5 |
1 |
9 |
1 |
5 |
8 |
9 |
=(
1 |
9 |
8 |
9 |
1 |
5 |
=1×
1 |
5 |
=
1 |
5 |
(3)0.32×6.7+3.2×0.33,
=3.2×0.67+3.2×0.33,
=(0.67+0.33)×3.2,
=1×3.2,
=3.2;
(4)
4 |
9 |
3 |
4 |
3 |
16 |
1 |
4 |
=
4 |
9 |
3 |
4 |
1 |
4 |
3 |
16 |
=
4 |
9 |
1 |
2 |
3 |
16 |
=
4 |
9 |
5 |
16 |
=
5 |
36 |
练习册系列答案
相关题目