Question

13/18乘以5.16加百分之五百一十六乘以3/5简便运算？

Answer 1

13/18×5.16+516/100×3/5
＝13/18×516/100+516/100×3/5
＝（13/18+3/5）×516/100
＝（65/90+54/90）×516/100
＝119/90×516/100
＝5117/750

Answer 2

13/18×5.16+100/516×3/5
=13/18×5.16+5.16×3/5
=5.16×(13/18+3/5)
=5.16×(65/90+54/90)
=5.16×119/90
=5.16×1.32
=6.8112