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1、單擊此處編輯母版標題樣式,,單擊此處編輯母版文本樣式,,第二級,,第三級,,第四級,,第五級,,,,*,九 加 幾,授課 :何杰,歡迎指導!,,,7,,,根據數的組成填空,:,,8,5,1,4,1,3,6,1,8,1,9,1,2,,1,想一想,9 +,( ),=10,9 + 1 + 1 =,,,9 + 1 + 6 =,,,9 + 1 + 7 =,,10,10,10,11,16,17,1,,你發(fā)現(xiàn)了什么?,算一算,3,,,,,,,,,,,,,9,+,3=,,1,2,10,12,,,,,,,,,,,,,,,,,9,+,7=,,6,10,16,1,9 + ( ) = (
2、 ),9 + ( ) = ( ),4,13,8,17,,圈一圈,算一算,.,9 + 5 =,( ),9 + 6 =,( ),14,15,,11,1,5,15,,1,8,18,9 + 2 =,6 + 9 =,,,10,10,10,9 + 9 =,1,,,,,,,,,,,,,,1,,你真棒!,9+5= 9+2=,,9+4= 6+9=,,9+0= 9+1=,,8+9= 3+9=,,9+7= 9+9=
3、,,9+10= 7+9=,14,11,13,15,9,10,17,12,16,18,19,看誰算得又對又快!,16,本 課 小 結,9 + 6 =,,1,5,10,,15,,湊 十 法,,想一想我們今天學習了哪些,9,加幾的算式?,,9 + 1 = 10,,9 + 2 = 11,,9 + 3 = 12,,9 + 4 = 13,,9 + 5 = 14,,9 + 6 = 15,,9 + 7 = 16,,9 + 8 = 17,,9 + 9 = 18,,9 + 10 = 19,,仔細觀察你發(fā)現(xiàn)了什么?,一九一九好朋友,,,二八二八手拉手,,,三七三七真親密,,,四六四六一起走,,,五五湊成一雙手。,,湊十歌,下課了!,