一、毫米、分米、千米的认识
★信息窗1-1
建议用时:6分钟
实际用时:分钟
66-60 =
50-30 =
66÷9 =
80÷9 =
35÷6 =
20+70 =
60-5 =
9÷8 =
44÷7 =
33÷5 =
50+20 =
17+19 =
70+16 =
57+24 =
77÷9 =
20-7 =
96-60 =
54+6 =
30-2 =
8×9 =
17÷2 =
6×5 =
73÷8 =
21÷6 =
31÷7 =
320-70 =
400+50 =
7500-900 =
50÷8 =
31÷9 =
6×9 =
62+3 =
54+7 =
21+9 =
31-7 =
100-80 =
19-10+7 =
42÷8 =
70-70 =
14-6 =
870-150 =
70-16 =
57÷8 =
800+700 =
1500-600 =

66-60 = 6
50-30 = 20
66÷9 = 7……3
80÷9 = 8……8
35÷6 = 5……5
20+70 = 90
60-5 = 55
9÷8 = 1……1
44÷7 = 6……2
33÷5 = 6……3
50+20 = 70
17+19 = 36
70+16 = 86
57+24 = 81
77÷9 = 8……5
20-7 = 13
96-60 = 36
54+6 = 60
30-2 = 28
8×9 = 72
17÷2 = 8……1
6×5 = 30
73÷8 = 9……1
21÷6 = 3……3
31÷7 = 4……3
320-70 = 250
400+50 = 450
7500-900 = 6600
50÷8 = 6……2
31÷9 = 3……4
6×9 = 54
62+3 = 65
54+7 = 61
21+9 = 30
31-7 = 24
100-80 = 20
19-10+7 = 16
42÷8 = 5……2
70-70 = 0
14-6 = 8
870-150 = 720
70-16 = 54
57÷8 = 7……1
800+700 = 1500
1500-600 = 900

拓展园地
一个商店正在搞促销活动:用4个空可乐瓶子可以换1瓶可乐。如果买4瓶可乐,那么最多可以喝到多少瓶可乐？

4 + 1 = 5（瓶）
答：最多可以喝到5瓶可乐。