Question

逆用乘法分配律简算 64乘25加35乘25加25 54乘154减45乘54减54乘9 怎样算

Answer 1

64*25+35*25+25
=25*(64+35+1)
=25*100
=2500
54*154-45*54-54*9
=54*(154-45-9)
=54*100
=5400