七、多位数除以一位数
★信息窗 1-2
建议用时:6分钟
实际用时:分钟
5×70 = 8×60 = 9×80 =
350÷5 = 480÷8 = 720÷9 =
3×30 = 30×7 = 3×70 =
90÷3 = 210÷7 = 210÷3 =
4×50 = 4×80 = 3×60 =
200÷4 = 320÷4 = 180÷3 =
50×6 = 70×8 = 6×600 =
300÷6 = 560÷8 = 3600÷6 =
6×90 = 60×1 = 30×4 =
540÷6 = 60÷1 = 120÷4 =
2×70 = 70×7 = 20×9 =
140÷2 = 490÷7 = 180÷9 =
3×90 = 80×5 = 30×4 =
270÷3 = 400÷5 = 120÷4 =

5×70 = 350
8×60 = 480
9×80 = 720
350÷5 = 70
480÷8 = 60
720÷9 = 80
3×30 = 90
30×7 = 210
3×70 = 210
90÷3 = 30
210÷7 = 30
210÷3 = 70
4×50 = 200
4×80 = 320
3×60 = 180
200÷4 = 50
320÷4 = 80
180÷3 = 60
50×6 = 300
70×8 = 560
6×600 = 3600
300÷6 = 50
560÷8 = 70
3600÷6 = 600
6×90 = 540
60×1 = 60
30×4 = 120
540÷6 = 90
60÷1 = 60
120÷4 = 30
2×70 = 140
70×7 = 490
20×9 = 180
140÷2 = 70
490÷7 = 70
180÷9 = 20
3×90 = 270
80×5 = 400
30×4 = 120
270÷3 = 90
400÷5 = 80
120÷4 = 30

拓展园地
从640里面连续减去8，减多少次才能得0？

640÷8=80（次）
答：减80次才能得0。