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(12+13+15)÷130+(13+15+17)÷1105+(15+17+19)÷1315=.
题目详情
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=______.
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▼优质解答
答案和解析
(
+
+
)÷
+(
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)÷
+(
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)÷
=(
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)×30+(
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)×105+(
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)×315
=15+10+6+35+21+15+63+45+35
=(15+35+15+45+35)+(10+6+21+63)
=145+100
=245
故答案为:245.
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=(
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=15+10+6+35+21+15+63+45+35
=(15+35+15+45+35)+(10+6+21+63)
=145+100
=245
故答案为:245.
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