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1、整十数加、减整十数 快来填一填 6个十减3个十是( )个十 3个十加4个十是( )个十 3 7 2 + 3 = 5 4 + 3 = 1 + 9 = 5 + 4 = 6 + 2 = 7 10 9 8 20+30 = 40+30 = 10+90 = 50+40 = 60+20 = 50 70 100 90 80 抢答 6 3 = 3 7 2 = 9 4 = 4 2 = 5 4 = 5 5 2 1 60 30 = 70 20 = 90 40 = 40 20 = 50 40 = 30 50 50 20 10 10 10 10 30 + 5 = 35 10 10 10 10 10 10 10 10 30
2、 + 50 = 80 50+30 = 40+30 = 10+70 = 50+40 = 60+20 = 80 70 80 90 80 抢答 8030 = 70 20 = 80 40 = 6020 =50 30 = 50 50 40 4020 40 20 60 猜一猜 30 50 80 猜一猜 90 40 50 60 30 30 60元 20元 ? 元 帮我算一算 60元30元20元 你想买哪些商品?需 要多少钱? 10 + 30 ( ) 20 +( ) 25 25 +( )= 25 -( ) 10+30 40+30 50-20 70-30 20+30 30+10 70-20 50-10 60-0 40-10 40+0 30-0 100-50 100-60 80-60 20+20 90-30 太谢谢了 ! 10 20 30 粉花和白花一共多少盆? 白花和黄花一共多少盆? 黄花和粉花一共多少盆? 10 + 20= 30 20 + 30= 50 30 + 10= 40 40 10 = 30