珠心算教程:20以内基本加减算(2)
直减、破五减基本练习
9-9
9-8 8-8
9-7 8-7 7-7
9-6 8-6 7-6 6-6
9-5 8-5 7-5 6-5 5-5
9-4 8-4 7-4 6-4 5-4 4-4
9-3 8-3 7-3 6-3 5-3 4-3 3-3
9-2 8-2 7-2 6-2 5-2 4-2 3-2 2-2
9-1 8-1 7-1 6-1 5-1 4-1 3-1 2-1 1-1
进位加、破五进位加基本练习:
9+1
9+2 8+2
9+3 8+3 7+3
9+4 8+4 7+4 6+4
9+5 8+5 7+5 6+5 5+5
9+6 8+6 7+6 6+6 5+6 4+6
9+7 8+7 7+7 6+7 5+7 4+7 3+7
9+8 8+8 7+8 6+8 5+8 4+8 3+8 2+8
9+9 8+9 7+9 6+9 5+9 4+9 3+9 2+9 1+9
退位减、退位满五减基本练习:
18-9 17-9 16-9 15-9 14-9 13-9 12-9 11-9 10-9
17-8 16-8 15-8 14-8 13-8 12-8 11-8 10-8
16-7 15-7 14-7 13-7 12-7 11-7 10-7
15-6 14-6 13-6 12-6 11-6 10-6
14-5 13-5 12-5 11-5 10-5
13-4 12-4 11-4 10-4
12-3 11-3 10-3
11-2 10-2
10-1