题目内容
计算下面各题
8.6×8
+8.6÷
÷[
-(
+
)]
×12×
34÷
.
8.6×8
2 |
5 |
5 |
8 |
1 |
4 |
7 |
8 |
3 |
8 |
1 |
4 |
5 |
2 |
4 |
3 |
34÷
53 |
54 |
分析:按照分数的四则混合运算顺序,结合运算定律,即可解决此类问题.
解答:解:8.6×8
+8.6÷
,
=8.6×8
+8.6×
=8.6×(8
+
),
=8.6×10,
=86;
÷[
-(
+
)],
=
÷[
-
],
=
÷
,
=
×
,
=1;
×12×
,
=30×
,
=40;
34÷
,
=34×
,
=34
.
故答案为:86;1;40;34
.
2 |
5 |
5 |
8 |
=8.6×8
2 |
5 |
8 |
5 |
=8.6×(8
2 |
5 |
8 |
5 |
=8.6×10,
=86;
1 |
4 |
7 |
8 |
3 |
8 |
1 |
4 |
=
1 |
4 |
7 |
8 |
5 |
8 |
=
1 |
4 |
2 |
8 |
=
1 |
4 |
8 |
2 |
=1;
5 |
2 |
4 |
3 |
=30×
4 |
3 |
=40;
34÷
53 |
54 |
=34×
54 |
53 |
=34
34 |
53 |
故答案为:86;1;40;34
34 |
53 |
点评:此题考查了分数四则混合运算的方法及利用运算定律进行简便计算的方法.
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