ǰλãҳ > 2016最新北师大版二年级下册数学?单元《时、分、秒》练习题3 - 百度文库
ʱ֡롷ۺϰ
1 һ 6=()
8
Сʱ=( )
1Сʱ=()
()=2
240=( )
230=( )
2ȴС
180O 4Сʱ 60 O 6 8СʱO 480 200 O 3 400O 7Сʱ
5
O 50
3ж⡣
(1) ̳ÿӪҵ 12 Сʱ( ) (2)
12 5 25ӡ( )
(3) ʱ 1 8 8 Сʱ( ) (4) 1 ȦһС ( ) (5) 1 12 =112 롣( )
( 6)ְÿ칤 8:00 ( ) ( 7)һӰԼ 2 Сʱ( ) ( 8)μϢ 10 ӡ(
)
( 9)ʱ 30 ӡ( ) 4Ӧ⡣
( 1)֯ΣҪ 50 ӣ9:30 ʲ
ôʱܵĿĵ?
ССȥɽСɽ
1Сʱ10֣ɽ 50
ӣСɽɽ 20ӣСɽ˶ʱ?
(3)ش⡣
Ӱӳ
ӳ
ص
Ӱӳ˶ʱ?
СӰص˶ʱ?
92ƪĵ