2022一年级数学下册第4单元100以内数的认识第7课时十数加一位数及相应的减法习题课件1新人教版202206201213

第,1,课时理解整十数加一位数及相应的减法的算理,RJ 1,年级下册,第,4,单元,100,以内数的认识,教材习题,1,（选题源于教材,P49,第,1,题,）,70,8 = 40,4 = 5,70 = 3,90 =,78,8 = 44,4 =,75,70 = 93,90 =,78,70 = 44,40 = 75,5 = 93,3 =,78,44,75,70,40,5,93,3,8,4,70,90,2,（选题源于教材,P49,第,2,题,）,50,3 =53,（人），,53,55,，够。,（选题源于教材,P49,第,3,题,）,3.,=,（ ）,29,9,20,页,4,（选题源于教材,P49,第,1,题,）,54,4 = 2,70 = 65,5 = 20,6 =,90,5 = 77,7 =,69,60 = 28,20 =,37,7 = 6,70 = 34,30 = 89,9 =,50,72,60,95,70,9,26,8,30,76,4,80,（选题源于教材,P49,第,5,题,）,5.,=,（ ）,40,8,48,条,一共钓了多少条鱼？,1,2,3,4,提示,：,点击 进入习题,知识点,整十数加一位数及相应的减法的算理,1.,看图填写算式。,30,6,36,36,30,6,36,6,30,易错辨析,辨析：什么数减,8,得,80,，要求这个数，就把,8,与,80,合起来，用加法计算。,2.,在,里,填入合适的数。,30,39,5,45,6, ,66,40,48,56,50,78,8,3,53,8,80,40,8,9,40,60,8,6,70,50,88,48,提升点,1,提高计算能力,3.,算一算。,87,9,50,72,70,93,4,69,20,84,7,70,提升点,2,提高灵活比大小的能力,4.,在 里填上“,”“”,或“”。,30,3 3,30 42,2 40,2,60,7 70,656,50 56,6,75,5 73,3 98,8 80,8,