3/19×5/7+16/19×2/5脱式怎么计算?
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解:3/19×5/7+16/19×2/5等于( 299/665 )
∵已知需求出3/19×5/7+16/19×2/5等于多少
∴3/19 × 5/7 + 16/19 × 2/5
= 15/133 + 32/95
= (15×5)/(133×5)+(32×7)/(95×7)
= 75/665 + 224/665
= (75+224)/665
= 299/665
答:3/19×5/7+16/19×2/5等于299/665
∵已知需求出3/19×5/7+16/19×2/5等于多少
∴3/19 × 5/7 + 16/19 × 2/5
= 15/133 + 32/95
= (15×5)/(133×5)+(32×7)/(95×7)
= 75/665 + 224/665
= (75+224)/665
= 299/665
答:3/19×5/7+16/19×2/5等于299/665
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