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急!英语数学题1）write7asasumoftwosmallernumbersindifferentways.7=1+67=2+57=3+47=4+37=5+27=6+1howarethesumsontheleftthesameasthesumsontheright?
题目详情
急!英语数学题
1）write 7 as a sum of two smaller numbers in different ways.
7=1+6
7=2+5
7=3+4
7=4+3
7=5+2
7=6+1
how are the sums on the left the same as the sums on the right?
1）write 7 as a sum of two smaller numbers in different ways.
7=1+6
7=2+5
7=3+4
7=4+3
7=5+2
7=6+1
how are the sums on the left the same as the sums on the right?
▼优质解答
答案和解析
the sums on the left is 7+7+7+7+7+7=42
the sums on the right is (1+2+3+4+5+6)*2=42
so
the sums on the left=the sums on the right
the sums on the right is (1+2+3+4+5+6)*2=42
so
the sums on the left=the sums on the right
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