* 1+1 2+1 1+2 3+1 2+2 1+3 4+1 3+2 2+3 1+4 5+1 4+2 3+3 2+4 1+5 6+1 5+2 4+3 3+4 2+5 1+6 7+1 6+2 5+3 4+4 3+5 2+6 1+7 8+1 7+2 6+3 5+4 4+5 3+6 2+7 9+1 8+2 7+3 6+4 5+5 4+6 3+7 1+8 2+8 2-1 3-1 3-2 4-1 4-2 4-3 5-1 5-2 5-3 5-4 6-1 6-2 6-3 6-4 6-5 7-1 7-2 7-3 7-4 7-5 7-6 8-1 8-2 8-3 8-4 8-5 8-6 8-7 9-1 9-2 9-3 9-4 9-5 9-6 9-7 10-1 10-2 10-3 10-4 10-5 10-6 10-7 9-8 10-8 9+2 8+3 7+4 6+5 5+6 4+7 3+8 2+9 9+3 8+4 7+5 6+6 5+7 4+8 3+9 9+4 8+5 7+6 6+7 5+8 4+9 9+5 8+6 7+7 6+8 5+9 9+6 8+7 7+8 6+9 9+7 8+8 7+9 9+8 8+9 9+9 11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-2 12-9 12-8 12-7 12-6 12-5 12-4 12-3 13-9 13-8 13-7 13-6 13-5 13-4 14-9 14-8 14-7 14-6 13-5 15-9 15-8 15-7 15-6 16-9 16-8 16-7 17-9 17-8 18-9 11-9 11-8 11-7 11-6 11-5 11-4 11-3 11-2 12-9 12-8 12-7 12-6 12-5 12-4 12-3 13-9 13-8 13-7 13-6 13-5 13-4 14-9 14-8 14-7 14-6 14-5 15-9 15-8 15-7 15-6 16-9 16-8 16-7 17-9 17-8 18-9 + = + = - = - = + = + = - = - = 9+8= 11-6= 16-9= 15-7= 3+8= 12-5= 12-6= 8+7= 15-6= 14-5= 7+7= 14-6= 14-8= 13-6= 7+9= 6+6= 13-7= 12-9= 11 5 7 8 11 7 6 15 9 9 14 8 6 7 16 12 6 3 我们一共折了16只纸船,我折了9只。 我折了( )只。 = (只) 16 - 9 = (只) 7 3+8= 11-3= 11-8= 4+9= 13-4= 13-9= 5+7= 12-5= 12-7= 11 8 3 13 9 4 12 7 5 *
加、减法表.ppt
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