题目内容
看图写算式.
(1)

+
+
=
×
(2)

+
=
=
×
=
(3)

+
+
+
=
.
×
.
(1)
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
1
1
.| 1 |
| 3 |
| 1 |
| 3 |
3
3
=1
1
(2)
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 6 |
| 4 |
| 6 |
| 4 |
1
| 1 |
| 2 |
1
.| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
2
2
=| 6 |
| 4 |
| 6 |
| 4 |
1
| 1 |
| 2 |
1
| 1 |
| 2 |
(3)
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
4
4
=| 8 |
| 9 |
| 8 |
| 9 |
分析:(1)根据示意图,等号前面的每个图形涂色的部分占总体的
,因此列式为
+
+
=1,用乘法算式表示为
×3=1;
(2)根据示意图,等号前面的每个图形涂色的部分占总体的
,因此列式为
+
=
=1
,用乘法算式表示为
×2=
=1
;
(3)根据线段图,弧线所示的每部分占总体的
,因此列式为
+
+
+
=
,用乘法算式表示为
×4=
.
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
(2)根据示意图,等号前面的每个图形涂色的部分占总体的
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 6 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 6 |
| 4 |
| 1 |
| 2 |
(3)根据线段图,弧线所示的每部分占总体的
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 8 |
| 9 |
| 2 |
| 9 |
| 8 |
| 9 |
解答:解:(1)
+
+
=1,
×3=1;
(2)
+
=
=1
,
×2=
=1
;
(3)
+
+
+
=
,
×4=
.
故答案为:(1)
,
,
,1,
,3,1;(2)
,
,
,1
,
,2,
,1
;(3)
,
,
,
,
,
,4,
.
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
(2)
| 3 |
| 4 |
| 3 |
| 4 |
| 6 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 6 |
| 4 |
| 1 |
| 2 |
(3)
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 8 |
| 9 |
| 2 |
| 9 |
| 8 |
| 9 |
故答案为:(1)
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
| 6 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 6 |
| 4 |
| 1 |
| 2 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 8 |
| 9 |
| 2 |
| 9 |
| 8 |
| 9 |
点评:此题先看懂示意图所表示的意义,然后列式计算.
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