口算基础过关 对 ( ) 题 ____分____秒
39÷100 = 630÷1000 = 408÷8 =
7.02×10 = 9.8÷100 = 36.5÷1000 =
644÷2 = 0.027×100 = 24÷10 =
103×4 = 960÷3 = 39.7÷100 =
39÷100 = 630÷1000 = 408÷8 =
7.02×10 = 9.8÷100 = 36.5÷1000 =
644÷2 = 0.027×100 = 24÷10 =
103×4 = 960÷3 = 39.7÷100 =
答案:
0.39 0.63 51 70.2 0.098 0.0365
322 2.7 2.4 412 320 0.397
322 2.7 2.4 412 320 0.397
1. 把下面各数先改写成用“万”作单位的数,再保留两位小数。
42795 = ( )万≈( )万
3697 = ( )万≈( )万
2373124 = ( )万≈( )万
495348 = ( )万≈( )万
337069 = ( )万≈( )万
答案:
1. 4.2795 4.28 0.3697 0.37
237.3124 237.31 49.5348 49.53
33.7069 33.71
237.3124 237.31 49.5348 49.53
33.7069 33.71
2. 把下面各数先改写成用“亿”作单位的数,再保留两位小数。
3720990000 = ( )亿≈( )亿
2539700000 = ( )亿≈( )亿
906300900 = ( )亿≈( )亿
641798000 = ( )亿≈( )亿
28070003000 = ( )亿≈( )亿
899503200 = ( )亿≈( )亿
3720990000 = ( )亿≈( )亿
2539700000 = ( )亿≈( )亿
906300900 = ( )亿≈( )亿
641798000 = ( )亿≈( )亿
28070003000 = ( )亿≈( )亿
899503200 = ( )亿≈( )亿
答案:
2. 37.2099 37.21 25.397 25.40
9.063009 9.06 6.41798 6.42
280.70003 280.70 8.995032 9.00
9.063009 9.06 6.41798 6.42
280.70003 280.70 8.995032 9.00
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