八点4×1⼀21等于多少

八点4×1/21等于多少
2024-12-25 17:05:48
推荐回答(2个)
回答1:

八点4×1/21等于14/35
8.4*1/21
=(8+0.4)*1/21
=(8+2/5)*1/21
=8*1/21+2/5*1/21
=8/21+2/105
=40/105+2/105
=42/105
=14/35

回答2:

8.4x1/21
=8.4/21
=0.4