16- 5 = 13- 2 = 6 +12 = 15-14 = 7 + 0 = 12+ 7 = 2 +10 = 5 +11 = 6 + 0 = 13-10 = 16-13 = 5 + 2 = 16-14 = 5 +13 = 2 +10 = 12+ 3 = 3 + 1 = 19- 1 = 4 - 4 = 0 +18 = 12+ 5 = 2 +13 = 2 +15 = 19-13 = 18+ 0 = 4 +13 = 9 - 0 = 6 - 5 = 15- 4 = 10+ 2 = 6 +13 = 3 + 6 = 12+ 1 = 1 +18 = 18-11 = 1 + 8 = 4 + 4 = 12+ 4 = 0 +16 = 8 - 2 = 3 +10 = 2 + 1 = 6 - 6 = 3 +13 = 6 - 3 = 4 +13 = 5 + 1 = 7 - 5 = 19-19 = 13+ 2 = 16-14 = 16+ 3 = 13-13 = 6 - 2 = 4 +12 = 10+ 0 = 6 - 2 = 4 - 1 = 16-14 = 6 +12 = 15+ 3 = 12-11 = 4 - 1 = 16-14 = 12+ 4 =
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20以内的加减法概述.doc
16-5=13-2=6+12=15-14=7+0=12+7=2+10=5+11=6+0=13-10=16-13=5+2=16-14=5+13=2+10=12+3=3+1=19-1=4-4=0+18=12+5=2+13=2+15=19-13=18+0
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