Question

45x45+45x53+45x2简便计算 另帮我368-165+32-35的简便计算告诉我,

Answer 1

45x45+45x53+45x2
=45×(45+53+2)
=45×100
=4500
368-165+32-35
=(368+32)-(165+35)
=400-200
=200