错题集(一年级数学下)

1、有一筐乒乓球，每次拿走5个乒乓球，最后还剩下1个，问这筐乒乓球可能有多少个？（在合适的答案下面画“√”）

2、在你认为合适的答案下面画“√”

小英说：“我踢了26个球。”

小军说：“我踢的和小英差不多”

3、在你认为合适的答案下面画“√”

小英说：“我踢了26个球。”

小军说：“我踢的比小英多一半”

4、45的十位上是（），表示（）个（）；

个位上是（），表示（）个（）。

5、比最小的两位数小1的数是（），比最大的两位数小1的数是（）。

6、十位上是5的最大两位数减去17等于（ ）。

十位上是8的最小两位数加上最大的1位数等于（ ）。

7、计数器的右边起，第一位是（ ）位，第二位是（ ）位，第三位是（ ）位，第一位和第二位组成的数中，最大的数是（ ），最小的数是（ ）。

8、在得数是四十几的算是后面画“√”

37+4□ 34+4□ 5+42□

27+20□ 4+64□ 5+24□

9、根据“百位数”填表

10、裤子65元，衣服比裤子贵13元，衣服多少钱？

□○□=□

裤子65元，衣服比裤子便宜13元，衣服多少钱？ □ ○□=□

11、有10颗柳树、30颗松树、20颗杨树

（1）杨树和松树一共多少颗？

□○□=□

（2）柳树比杨树少多少颗？

□○□=□

12、在计算器上用3颗珠子拨一个两位数，最大的数是（）

在计算器上用4颗珠子拨一个两位数的奇数，最大的是（），最小的是（）。

13、农场养了48头奶牛，36头水牛，23头黄牛。

（1）奶牛比水牛多多少头？

□○□=□

（2）黄牛比奶牛少多少头？

□○□=□

14、大光和小明都有50张画片，大光送给小明5张后，小

明比大光多（）张？

15、一座城堡每层之间有10个台阶，这座城堡有5层，小

华现爬到了第三层。

（1）这座城堡一共有（）个台阶？

（2）小华一共爬了（）个台阶？

（3）小华还要爬（）个台阶就到最顶层了？

16、找出得数是五十几的算式，在（）里画“√”。

24+50（）8+50（）10+46（）

46+3（）33+20（）4+55（）

17、

□○□=□

18、冬冬家养了一些鸭，其中一半在水里，剩下的鸭一半在树林里，一半在树林外。树林外的鸭有20只。冬冬家一共养鸭（）只。

19、爸爸、妈妈带着丁丁去看电影，成人票每张40元，儿童票只要半价。全家一共要花（）元买票。

20、一个两位数，个位上是比6大的偶数，十位上是比5大的奇数。这个两位数最小是（），最大是（）。

21、把56、65、87、78、90、54、27、68、43填入下面合适的圈里。

大于60的偶数小于60的奇数

22、有27个小朋友排成一排。豆豆排在正中间的位置。从左往右数，豆豆排在第（），从右往左数，豆豆排在第（）

23、每个图中画6个圆点表示一个两位数。

用6个圆点表示的两位数中，最大的是（ ），最小的是（ ）。

24、9个十是（ ）十。10个十是（ ）。

6个十和8个一合起来是（ ），再添2个一是（ ）十。

9个十和5个一合起来是（ ），再添（ ）个一是一百。

25、（1）五个五个的数，从八十五数到一百，一共数了（ ）

个数。

（2）两个两个的数，从八十数到一百，一共数了（ ）

个数。

（3）十位是7的两位数，最小的是（ ），最大的是（ ）。

（4）1个十比1个一多（ ）个一，1个百比1个十多

（ ）个十。

Italian patients with diabetic foot ulceration (DFUs) suffered mightily during the height of the coronavirus pandemic in that country, according to a newly published study.

Amid a mandatory national lockdown, the rates of amputations skyrocketed at a hospital far from the

hardest-hit region as many patients developed gangrene.

The findings offer critical lessons for the United States, said wound care specialist William H. Tettelbach, MD, of Western Peaks Specialty Hospital near Salt Lake City. "It's become more obvious that outpatient wound care is a critical care need for the community because of the risk of ignoring these chronic wounds and letting them remain open. We cannot let these services be closed down like some were when the pandemic started."

The study, led by Paola Caruso, MD, of the University of Campania Luigi Vanvitelli in Naples, appeared in Diabetes Care.

The researchers launched the study to understand how patients with diabetes and DFU fared during the height of the pandemic in Italy, where tens of thousands of people died, mainly in the northern region of the country. They focused on patients in the southern region who were admitted to the division of endocrinology and metabolic diseases at the Teaching Hospital at the University of Campania Luigi Vanvitelli.

The study compared 25 patients who were admitted from March 9 to May 18, 2020, with 38 patients who were admitted from a longer period between January and May 2019. The demographics of the groups are similar, with average ages in the early 60s and more men than women (21:4, respectively, in 2020 and 23:15, respectively, in 2019.)

The results reveal high numbers of emergent and serious cases in 2020. Compared with 2019, fewer were outpatients (16% vs. 45%, P = .028) and more were emergency patients (76% vs. 26%, P < .001). Clinically, gangrene was much more common in the 2020 group, compared with the 2019 group (64% vs. 29%, P = .009), as was amputation (60% vs. 18%, P = .001).

The researchers determined that amputation was more than three times more likely in the 2020 versus the 2019 group (relative risk, 3.26; 95% confidence interval, 1.55-6.84) even though the 2019 period was longer. After adjustment for gender, the heightened risk in 2020 was 2.50 (95% CI, 1.18-5.29).

There was no statistically significant increase in the risk of revascularization.

"The COVID-19 lockdown may have had a detrimental impact on amputation risk because of the sudden interruption of DFU care and lower-limb preservation pathways, resulting in delayed diagnosis and treatment," the researchers wrote. "DFU is often characterized by progressive clinical course, which can rapidly lead patients to critical worsening of their ulcers."

They added that "the higher risk of amputation observed during COVID-19 lockdown confirms the need for proper and timely management of DFU patients to prevent dramatic outcomes responsible for a reduction of quality of life and increased morbidity and mortality."

The study authors didn't discuss why more patients seemed to have stayed home and not gotten proper care. It's not clear if they were scared to get treatment or couldn't obtain it because of the national shutdown.

Both have been factors affecting diabetic foot care in the United States during the pandemic, said Dr. Tettelbach. He called the study "timely and pertinent," and said it highlights how wound care is "a critical need" that must remain available even when other medical services such as elective surgeries are shut down.

Infection-control protocols such as allowing patients to wait for appointments in their cars instead of waiting rooms will alleviate the fears of certain patients about seeking in-person care during the pandemic, he said. But some patients will be afraid to come in no matter what, he said, and home health may be the best solution for their care.

Several of the study authors reported various disclosures. Dr. Tettelbach reported no relevant disclosures.

SOURCE: Caruso P et al. Diabetes Care. 2020 Jul 23. doi:10.2337/dc20-1347.

This article originally appeared on https://www.wendangku.net/doc/b317548754.html,, part of the Medscape Professional Network.