參考答案
(1)4×25×32(2)125×8×2(3)125×64×25
=100×32 =125×8×2 =125×8×4×25
=3200 =1000×2 =1000×100
=2000 =100000
。4)(100-8)×125(5)126×99 (6)322×11
=100×125-8×125 =126×(100-1) =261×(10+1)
=12500-1000 =126×100-126 =322×10+322
=11500 =12600-126 =3220+322
=12474 =3542
(7)65×32+35×32(8)127×18-27×18
=(65+35)×32 =(127-27)×18
=100×32 =100×18
=3200 =1800
。9)888×778+444×444(10)45×4+4×10×18+60×9
=888×778+888×222 =180+4×180+3×180
=888×(778+222) =140×(1+4+3)
=888000 =1120
。11)2010×20122012÷2012×20102010
=2010×2012×10001÷2012×2010×10001
=1
(12)157157+843843
=157×1001+843×1001=(157+843)×1001=1000×1001=1001000