题目内容
怎样算简便就怎样算
×
+
÷6
÷
÷
3-
÷
-
.
7 |
10 |
1 |
6 |
3 |
10 |
4 |
15 |
5 |
6 |
8 |
9 |
3-
3 |
2 |
21 |
10 |
2 |
7 |
分析:(1)运用乘法分配律解答;
(2)依据除以一个数等于乘这个数的倒数,按照从左到右顺序解答;
(3)运用减法性质解答.
(2)依据除以一个数等于乘这个数的倒数,按照从左到右顺序解答;
(3)运用减法性质解答.
解答:解:(1)
×
+
÷6
=(
+
)×
=1×
=
;
(2)
÷
÷
=
×
×
=
×
=
;
(3)3-
÷
-
=3-
-
=3-(
+
)
=3-1
=2.
7 |
10 |
1 |
6 |
3 |
10 |
=(
7 |
10 |
3 |
10 |
1 |
6 |
=1×
1 |
6 |
=
1 |
6 |
(2)
4 |
15 |
5 |
6 |
8 |
9 |
=
4 |
15 |
6 |
5 |
9 |
8 |
=
8 |
25 |
9 |
8 |
=
9 |
25 |
(3)3-
3 |
2 |
21 |
10 |
2 |
7 |
=3-
5 |
7 |
2 |
7 |
=3-(
5 |
7 |
2 |
7 |
=3-1
=2.
点评:本题主要考查学生运用简便方法,以及四则运算顺序正确解决问题的能力.
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