Question

68/85乘46加23/85乘49简便计算？

Answer 1

这个先观察，分母都是85，分子里面有公因数23，提取出来23/85后，再计算
解：68/85x46+23/85x49
=68x2x23/85+49x23/85
=23/85x(136+49)
=23/85x(100+85)
=2300/85+23
=460/17+23
=27+1/17+23
=50+1/17
=50又1/17

Answer 2

68/85x46+23/85x49
=68x2x23/85+49x23/85
=23/85x(136+49)
=23/85x(100+85)
=2300/85+23
=27又5/85+23
=50又1/17。

Answer 3

68/85×46+23/85×49
=68/85x2×23+23/85×49
=23/85×68×2+23/85×49
=23/85×（136+49）
=23/85×185
=23/17×37
=23/17×（34+3）
=23/17×34+23/17×3
=46+69/17
=46+4又1/17
=50又1/17