两位数减一位数 .ppt

,两位数减一位数和整十数,用六边形外面的数作为被减数，分别减去6和8。说出得数，,90连续减9，写出每次减得的差。90 81、。,72,63,45,54,36,27,18,98-9=,27-8,建房子,19,89,80-7=,73,35-7=,28,33-7=,26,30-5=,25,42-3=,39,61-4=,57,52-6=,46,72-7=,65,98-60=,38,61-3=,58,47-20=,27,82-8=,74,50-6=,44,78-5=,73,42-7=,35,37-9=,28,65-4=,61,胜利！,284,408,35-8,34-8,636,458,668,849,跷跷板,王宁再攒多少张邮票就和李敏同样多了？,31,-,8,23,我拔了36个萝卜。,已经运走了20个，还剩（）个。,大家吃了9个，还剩（）个。,362016（个）,36927（个）,拔萝卜,16,27,34,-,8,26,20,-,8,12,