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1、六、6和7的加减法 用数学,5 + 1 = 6 1 + 5 = 6,7 - 1 = 6 7 - 6 = 1,摆一摆。,想一想。,我家有 5 口人。,我家住 302。,2,6,? 人,7 个,3,4,? 个,6 个,3,3,-,? 个,?只,2,7,+,1.,6,4 2,4,6,2,5 1,3,6,3,2,7,5,3 4,1,7,6,7,6,2 3 5,4,6,7,6,3,2,2.,3.,6 - =,2,4,- =,6,4,2,4.,3,7,+ =,3,4,7,7 - =,- =,5.,5,7,2,2,5,7 - 2 7 - 43 + 36 - 2,3 4 5 6,6 - 5 2 + 5 5 -
2、 3 7 - 7,0127,6.,7. 哪两张卡片上点子的数相加得 6 ? 哪两张卡片上点子的数相加得 7 ?,4 + 2 = 6,2 + 4 = 6,8. 拿出两张数字卡片，用大的数减小的数。,7 - 2 = 5,3 + 4 = 4 + 2 = 7 - 3 = 4 - 2 = 7 - 4 = 2 + 5 = 7 - 5 = 1 + 6 = 6 - 4 = 5 - 0 = 6 - 3 = 5 - 3 =,7,6,4,2,3,7,2,7,2,5,3,2,9.,( )个,7,10.,7,5,11.,+ =,6,1,7,+,5,1,6,2,=,7,=,+,4,3,7,2,=,6,=,1,5,=,+,3,2,5,4,=,7,=,1,4,=,3,6,=,3,4,-,2,4,-,？条,1,7,+,12.,？只,？只,6 条,13.,? 只,4 + =,2,6,7 只,1,6,-,？只,- =,14. 用下面的数字卡片,你能摆出几种算式?,+ =,2,5,7,- =,5,1,4,+ =,2,3,5,- =,5,2,3,+ =,2,1,3,- =,5,3,2,+ =,3,4,7,7,6,1,2,5,7,0,6,3,1,4,摆一摆，填一填。,( )个,5,( )个,6,( )个,8,