如题所述
第1个回答 2015-04-01
追答
这些呢?
本回答被提问者采纳第2个回答 2015-04-01
简便计算:
16x25
=16x5x5
=80x5
=400
16x125
=4x4x125
=125x4x4
=500x4
=2000
28x25
=28x5x5
=140x5
=700
32x125
=4x8x125
=125x4x8
=500x8
=4000
25x44
=5x5x44
=44x5x5
=220x5
=1100
125x18
=125x2x9
=250x9
=2250
16x25
=16x5x5
=80x5
=400
16x125
=4x4x125
=125x4x4
=500x4
=2000
28x25
=28x5x5
=140x5
=700
32x125
=4x8x125
=125x4x8
=500x8
=4000
25x44
=5x5x44
=44x5x5
=220x5
=1100
125x18
=125x2x9
=250x9
=2250
第3个回答 2015-04-01
追答
满意望采纳!
追问这些呢
第4个回答 2015-04-01
4*(4*25)
2*(8*125)
7*(4*25)
4*(8*125)
25*4*11
125*(10+8)=125*10+125*8
2*(8*125)
7*(4*25)
4*(8*125)
25*4*11
125*(10+8)=125*10+125*8