问题
选择题
778-499的简便算法是( )
A.778-500-1
B.778-500
C.778+500-1
D.778-500+1
答案
将499变为500-1计算比较简便,
则原式=778+500-1.
故选:C.
778-499的简便算法是( )
A.778-500-1
B.778-500
C.778+500-1
D.778-500+1
将499变为500-1计算比较简便,
则原式=778+500-1.
故选:C.
用方框中所给单词的适当形式填空 | |
2. There are many________near the Yellow River. They live by fishing. 3. I_________listening to classical music, but I like listening to pop music. 4. When I see the picture, it________me of my hometown. 5. I want two three-meter long ________to tie up the big box. 6. When l was young,I ________eating rice to corn(玉米). 7. I like singers who write their own_______. 8. Several boats________in the West Lake last year. |