⑴ 用簡便方法計算 24×12516×25125×32×2545×202-45
(1)24×125
=3×8×125
=3×(8×125)
=3×1000
=3000;
(2)16×25
=4×4×25
=4×(4×25)
=4×100
=400;
(3)125×32×25
=(125×8)×(4×25)
=1000×100
=100000;
(4)45×202-45
=45×(200+2)-45
=45×200+45×2-45
=9000+90-45
=9045.
⑵ 1000(12516)用簡便方法計算
1000/125/16
=8/16
=1/2
結果為2分之1