2+7=9 12+3=15 6+8=14 7+11=18 13+4=17 20+0=20 15-7=8 16-11=5
1个回答
Two and seven is Nine； twelve and three is fifteen；six and eight is fourteen；thirteen and four is seventeen；twenty and zero is twenty；fifteen minus seven is eight；sixteen minus eleven is five；twenty minus nineteen is one；eighteen minus four is fourteen；eight minus five is three;seventeen minus two is fifteen；three and four is seven；sixteen minus eleven is five；eighteen and two is twenty.
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