97*50=立等式简便算法
问题描述:
97*50=立等式简便算法
答
90*50+7*50
答
97*50
=(100-3)*50
=100*50-3*50
=5000-150
=4850
答
97*50
=(100-3)×50
=100×50-3×50
=5000-150
=5000-100-50
=4900-50
=4850