整十数加一位数及相应的减法,人教新课标一年级数学下册,教学目标,1.使同学们掌握整十数加一位数和相应的减法的计算方法。2.培养同学们抽象概括能力。3.通过加、减法的学习,使同学们感悟到知识之间内在联系的逻辑之美,增强同学们审美意识。,一共买了多少瓶?,30 + 2 =,32,还剩几瓶?,32 2 =,30,2 + 30 =,32,50 + 6 = 56,35 - 5 = 30,根据上图列算式并计算。,20,4,24,24,4,20,4,20,24,24,20,4,20,8,28,28,8,20,8,20,28,28,20,8,30 + 4 = 34,34 - 4 = 30,4 + 30 = 34,34 - 30 = 4,填空 ()四十五里面有()个十和()个一 ()可以分成()个十和()个一 (3)7个一和个十组成()()是()个十和()个一组成的,4,5,4,6,37,2,8,30+6= 7+50= 87-7= 63-3= 52-2= 5+40= 88-8=,6+60= 40+4= 45=( )+( ) 84-( )=81 38-( )=8 99-( )=( ) ( )-2=70,36,57,80,60,50,45,80,66,44,40,5,3,30,90,9,72,谢谢!,