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1、用计算器计算,小学数学第七册苏教版,34,3840,357,9018,48,2922,34,125,3672,306,918,12138,3120,780,9 9 1 =,98 9 2 =,987 9 3 =,9876 9 4 =,80,880,8880,88880,9 9 1 =,98 9 2 =,987 9 3 =,9876 9 4 =,80,880,8880,88880,9 9 1 =,98 9 2 =,987 9 3 =,9876 9 4 =,80,880,8880,88880,9 9 1 =,98 9 2 =,987 9 3 =,9876 9 4 =,80,880,8880,8888
2、0,9 9 1 =,98 9 2 =,987 9 3 =,9876 9 4 =,98765 9 5 =,987654 9 6 =,9876543 9 7 =,98765432 9 8 =,80,880,8880,88880,888880,8888880,88888880,888888880,19 + 99 =,118 + 989 =,1117 + 9879 =,11116 + 98769 =,111115 + 987659 =,1111114 + 9876549 =,11111113 + 98765439 =,111111112 + 987654329 =,100,1000,10000,100
3、000,1000000,10000000,100000000,1000000000,129- 8 =,1239- 7=,12349- 6=,123459- 5=,1234569- 4=,12345679- 3=,123456789- 2=,1234567899- 1=,100,1000,10000,100000,1000000,10000000,100000000,1000000000,（10-1） 9=,（200-2） 9=,（3000-3） 9=,（40000-4） 9=,（500000-5） 9=,（6000000-6） 9=,（70000000-7） 9=,（800000000-8）
4、9=,1,22,333,4444,55555,666666,7777777,88888888,38 =,338 =,3338 =,33338 =,3333338 =,333333338 =,24,264,2664,266664,26664,2666664,2666664,266666664,26666666666 6666666664,67 =,667 =,6667 =,6666667 =,66666666667 =,66667 =,42,462,4662,46662,4666662,4666666662,？,79 =,7799 =,777999 =,77779999 =,7777799999
5、 =,63,7623,776223,77762223,7777622223,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,15,14,14,14,9,16,18,10,11,21,22,23,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,14,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 2
6、5 2627 28 29 30 31,16,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,18,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,9,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,10,1 2 3 4 5 6 7 8 9 10 11 121
7、3 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,11,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,21,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,22,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29
8、30 31,23,1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31,23,2,3,6,5,0,0,2,4,0,0,0,0,0,0,5,2,6,3,2,4,5,0,0,0,2,3,6,5,0,0,2,4,0,0,0,0,0,0,5,2,6,3,2,4,5,0,0,0,2,3,6,5,0,0,7,2,0,0,0,0,0,0,5,2,6,3,2,4,5,0,0,0,2,3,6,5,0,0,7,2,0,0,0,0,0,0,5,7,6,3,2,4,5,0,0,0,2,3,6,5,0,0,7,2,0,0,0,0,0,0,5,7,2,3,2,4,5,0,0,0,4,2,3,6,5,0,0,7,2,0,0,0,0,0,0,5,7,2,3,2,9,4,4,0,0,4,
