要写出过程!谢谢!
第1个回答 2009-01-22
1.6*7.8*1.25
=2*0.8*7.8*1.25
=2*(0.8*1.25)*7.8
=2*1*7.8
=2*7.8
=15.6
=2*0.8*7.8*1.25
=2*(0.8*1.25)*7.8
=2*1*7.8
=2*7.8
=15.6
第2个回答 2009-01-21
=0.8×2×7.8×1.25
=0.8×1.25×2×7.8
=1×2×7.8
=15.6
=0.8×1.25×2×7.8
=1×2×7.8
=15.6
第3个回答 2009-01-21
1.6拆成0.8*2
0.8x1.25=1
1.56本回答被网友采纳
0.8x1.25=1
1.56本回答被网友采纳
第4个回答 2009-01-21
原式=(8ⅹ1.25-0.2ⅹ1.25)ⅹ1.6
=(10-0.25)ⅹ1.6
=9.75ⅹ1.6
=15.6
=(10-0.25)ⅹ1.6
=9.75ⅹ1.6
=15.6
第5个回答 2020-01-22
1.6×7.8×1.25
=(0.8×2)×7.8×1.25
=(0.8×1.25)×7.8×2
=15.6
10.3×99+10.3
=10.3×(99+1)
=1030
=(0.8×2)×7.8×1.25
=(0.8×1.25)×7.8×2
=15.6
10.3×99+10.3
=10.3×(99+1)
=1030