一年级数学下册41数数新人教版.pptx

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,#,100,以内的数,数数,1,个一,1,个十,10,个十是,100,100,根,4,18,9,100,2,你能一眼看出这里面有多少个球吗？,眼力大比拼,1,个一,10,个一,1 0,十,个,10,1 0 0,1,2 3 4 5 6 7 8 9 10,12 13 14 15 16 17 18 19,20,22 23 24 25 26 27 28 29,30,32 33 34 35 36 37 38 39,40,41 42 43 44 45 46 47 48 49,50,52 53 54 55 56 57 58 59,60,62 63 64 65 66 67 68 69,70,72 73 74 75 76 77 78 79,80,82 83 84 85 86 87 88 89,90,91 92 93 94 95 96 97 98 99,100,29,后面是,59,后面是,79,后面是,99,后面是,30,60,80,100,看你行不行,从三十五数到四十二。,三十五,四十二,从八十八数到一百。,八十八，,八十九，,九十，,九十一，,九十二，,九十三，,九十四，,九十五，,九十六，,九十七，,九十八，,九十九，,一百。,（）个十,（）个一,3,6,和,36,我会数数,1,、从,36,数到,43,36,37,38,39,40,我会数数,1,、从,36,数到,43,36,37,38,39,40,我会数数,1,、从,36,数到,43,41,42,43,36 37 38 39 40,4,个十,3,个一,43,和,我会数数,2,、,从,43,数到,52,44,45,46,47,48,49,50,43,我会数数,2,、从,43,数到,52,43 44 45 46 47 48 49 50,我会数数,2,、从,43,数到,52,43 44 45 46 47 48 49 50,52,51,52,5,个十,2,个一,和,我会数数,3,、从,36,倒数到,27,34,33,32,31,30,35,36,我会数数,3,、,从,36,倒数到,27,36 35 34 33 32 31 30,我会数数,3,、从,36,倒数到,27,29,28,27,36 35 34 33 32 31 30,26,、,28,、,30,、,20,、,30,、,40,、,55,、,60,、,65,、,他们是怎么数的？你能接着数下去吗？,50,、,60,、,70,、,80,、,90,、,100,70,、,75,、,80,、,85,、,90,、,95,、,100,32,、,34,、,36,、,38,、,40,、,42,、,44,28,30,32,34,36,38,40,42,50,55,60,65,70,75,80,85,抢答题,1,、数出,28,后面,5,个数,2,、倒着数出,61,前面,5,个数,3,、和,70,相邻的两个数是哪两个数,