可以先把带分数化成假分数,再约分,最后算出结果。
2021又2021/2022×1/2023
=4088483/2022×1/2023
=2021/2022×1/1
=2021/2022
也可以两次运用乘法分配律。
2021又2021/2022×1/2023
=(2021+2021/2022)×1/2023
=2021×(1+1/2022)×1/2023
=2021×[1×1/2023+1/2022×1/2023]
=2021×[2022/(2022×2023)+1/(2022×2023)]
=2021×2023/(2022×2023)
=2021×1/2022
=2021/2022