8.估算
58×62≈ | 103×38≈ | 504×83≈ |
702÷68≈ | 602÷58≈ | 912÷33≈ |
5.口算
880-220= | 600÷30= | 80×100= | 30×40= |
0×269= | 290亿-90亿= | 399+33= | 955-850= |
540÷90= | 550÷50= | 96÷32= | 170+99= |
4.一艘轮船限载60人,现在一共有200人,运( )次才能运完.
0 157832 157840 157846 157850 157856 157858 157862 157868 157870 157876 157882 157886 157888 157892 157898 157900 157906 157910 157912 157916 157918 157922 157924 157926 157927 157928 157930 157931 157932 157934 157936 157940 157942 157946 157948 157952 157958 157960 157966 157970 157972 157976 157982 157988 157990 157996 158000 158002 158008 158012 158018 158026 199269
A. | 4 | B. | 3 | C. | 2 | D. | 5 |