简便计算:1.50.6²-49.4² 2.56²-88×56+44²过程
问题描述:
简便计算:1.50.6²-49.4² 2.56²-88×56+44²
过程
答
1.50.6²-49.4²
=(50.6+49.4)( 50.6-49.4)
=100x1.2
=120
2.56²-88×56+44²
=(56-44)²
=8²=64
答
1.50.6²-49.4²
=(50.6+49.4)×(50.6-49.4)
=100×1.2
=120
2.56²-88×56+44²
=(56-44)²
=22²
=484
答
:1.50.6²-49.4²
=(50.6+49.4)(50.6-49.4)
=100*1.2
=120
2.56²-88×56+44²
=(56-44)^2
=12^2
=144