小二甲 蘇家榆 數補 p33 01/26/97 星期六 天氣：雨天 心情： 高興 (1) 16+( ) = 41 ( ) = 41-16 = 41-10-1-5 = 25 16+25 = 41 驗算： 41-25 = 41-20-1-4 = 16 (2) 27+( ) = 31 ( ) = 31-27 = 31-20-1-6 = 4 27+4 = 31 驗算：31-4 = 31-1-3 = 27 (3) 37+( ) = 64 ( ) = 64-37 = 64-30-4-3 = 27 37+27 = 64 驗算： 64-27 =64-20-4-3 = 37 (4) 48+( ) = 82 ( ) = 82-48 = 82-40-2-6 = 34 48+34 = 82 驗算： 82-34 = 82-30-2-2 = 48 (5) 58+( ) = 95 ( ) = 95-58 = 95-50-5-3 = 37 58+37 = 95 驗算： 95-37 = 95-30-5-2 = 58 (6) 39+( ) = 61 ( ) = 61-39 = 61-30-1-8 = 22 39+22 = 61 驗算： 61-22 = 61-20-1-1 = 39 (7) 29+( ) = 84 ( ) = 84-29 = 84-20-4-5 = 55 29+55 = 84 驗算： 84-55 = 84-50-4-1 = 29 (8) 19+( ) = 67 ( ) = 67-19 = 67-10-7-2 = 48 19+48 = 67 驗算：67-48 = 67-40-7-1 = 19 (9) 60-( ) = 49 ( ) = 60-49 = 60-40-9 = 11 60-11 = 49 驗算：49+11 = 49+10+1 = 60 (10) 70-( ) = 26 ( ) = 70-26 = 70-20-6 = 44 70-44 = 26 驗算： 26+44 = 26+40+4 = 70 (11) 80-( ) = 63 ( ) = 80-63 = 80-60-3 = 17 80-17 = 63 驗算： 63+17 = 63+10+7 = 80 (12) 91-( ) = 49 ( ) = 91-49 = 91-40-1-8 = 42 91-42 = 49 驗算： 49+42 = 49+40+1+1 = 91 (13) 71-( ) = 46 ( ) = 71-46 = 71-40-1-5 = 25 71-25 = 46 驗算： 46+25 = 46+20+4+1 = 71 (14) 81-( ) = 33 ( ) = 81-33 = 81-30-1-2 = 48 81-48 = 33 驗算： 33+48 = 33+40+7+1 = 81 (15) 62-( ) = 18 ( ) = 62-18 = 62-10-2-6 = 44 62-44 = 18 驗算： 18+44 = 18+40+2+2 = 62 (16) 72-( ) = 25 ( ) = 72-25 = 72-20-2-3 = 47 72-47 = 25 驗算： 25+47 = 25+40+5+2 = 72 (17) 63-( ) = 9 ( ) = 63-9 = 63-3-6 = 54 63-54 = 9 驗算： 9+54 = 9+50+1+3 = 63 (18) 53-( ) = 16 ( ) = 53-16 = 53-10-3-3 = 37 53-37 = 16 驗算： 16+37 = 16+30+4+3 = 53 (19) 74-( ) = 29 ( ) = 74-29 = 74-20-4-5 = 45 74-45 驗算：29+45 = 29+40+1+4 = 74 (20)84-( ) = 46 ( ) = 84-46 = 84-40-4-2 = 38 84-38 = 46 驗算： 46+38 = 46+30+4+4 = 84 (21) 95-( ) = 28 ( ) = 95-28 = 95-20-5-3 = 67 95-67 = 28 驗算： 28+67 = 28+60+2+5 = 95 (22) 76-( ) = 19 ( ) = 76-19 = 76-10-6-3 = 57 76-57 = 19 驗算： 19+57 = 19+50+1+6 = 76 (23) 67-( ) = 39 ( ) = 67-39 = 67-30-7-2 = 28 67-28 = 39 驗算39+68 = 39+60+1+7 = 67 (24) 78-( ) = 39 ( ) = 78-39 = 78-30-8-1 = 39 78-39 = 39 驗算： 39+39 = 39+30+1+8 = 78 《《 瀏覽次數：1 |
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