9.9+15.3—8.9簡便運算

9.9+15.3—8.9簡便運算


9.9+15.3—8.9 =
9.9-8.9+15.3=1+15.3=16.3



5/9-3/8+4/9+3/8簡便計算怎麼寫?
5/9-3/8+4/9+3/8
簡便計算怎麼寫?


原式=(5/9+4/9)+(3/8-3/8)=1+0 =1



怎麼簡便就怎麼算20.96-4.67-5.33(3/8+7/24-1/6)×48 69÷(0.8+0.6×2.5)


20.96-4.67-5.33
=20.96-(4.67+5.33)
=20.96-10
=10.96
(3/8+7/24-1/6)×48
=3/8×48+7/24×48 -1/6×48
=18+14-8
=24
69÷(0.8+0.6×2.5)
=69÷(0.8+1.5)
=69÷2.3
=30