1、人教版一年级下册数学第四单元数的顺序a.1a.4a.6a.10a.13 a.15a.18a.按顺序填写。a.2 3 5 7 8 9 a.11 12 14 16 17 19 20a.10a.9a.8a.7a.6a.5a.4a.3a.2a.1a.20a.19a.18a.17a.16a.15a.14a.13a.12a.11a.10a.8a.6a.4a.2a.1 3 5 7 9a.19a.17a.15a.13a.11a.10a.8a.6a.4a.2a.77a.99a.88a.66a.55a.44a.33a.22a.1 3 5 7 9a.12 14 16 18 20a.91a.82a.73a.64a.4
2、6a.37a.28a.19a.17a.15a.13a.11a.10a.8a.6a.4a.2a.77a.99a.88a.66a.55a.44a.33a.22a.1 3 5 7 9a.12 14 16 18 20a.55a.100a.98a.97a.96a.95a.94a.93a.92a.90a.89a.87a.86a.85a.84a.83a.81a.80a.79a.78a.76a.75a.74a.72a.71a.70a.69a.68a.67a.65a.63a.62a.61a.60a.59a.58a.57a.56a.54a.53a.52a.51a.50a.49a.48a.47a.45a.43a.4
3、2a.41a.40a.39a.38a.36a.35a.34a.32a.31a.30a.29a.27a.26a.25a.24a.23a.21a.20a.18a.16a.14a.12a.9a.7a.5a.3a.1a.2 a.11a.22a.33a.44a.55a.66a.77a.88a.99a.4 a.6 a.8 a.10a.15a.17a.19a.28a.37a.46a.64a.73a.82a.91a.13a.99a.88a.77a.66a.55a.44a.33a.22a.19a.17a.15a.13a.11a.10a.8a.6a.4a.2a.91a.82a.73a.64a.55a.46a.37
4、a.28a.19a.横着看，后面的比前面的数横着看，后面的比前面的数大大1a.竖着看，竖着看，个位数相同。个位数相同。a.15a.23a.在百数图表中找出下框里另外几个数。a.16a.25a.26a.13a.33a.22a.24a.和和79相邻的数是相邻的数是()和和()。b.78后面的数是（后面的数是（），），c.前面的数是（前面的数是（）。）。a.78a.80a.79a.77a.a.根据百数图，填出下图中缺少的数。根据百数图，填出下图中缺少的数。a.15a.35a.24 a.26a.13 a.14a.24a.在下面各数的后面，有规律地连续写出5个数。b.35、。c.56、。a.拓展提升拓展提升
