Question

22×32×42×52的值为多少？求简便过程

Answer 1

22×32×42×52
=22×28×48×52
=22×28×(50^2-2^2)
=22×7×(10000-16)
=1540000-22×7×16
=1540000-44×56
=1540000-(50^2-6^2)
=1540036-2500
=1537536
别忘了采纳我的哦

Answer 2

22×32×42×52
=22×28×48×52
=22×28×(50^2-2^2)
=22×7×(10000-16)
=1540000-22×7×16
=1540000-44×56
=1540000-(50^2-6^2)
=1540036-2500
=1537536

追问

32和42为啥变成28和48了？

追答

这样简单

22=37-15 52=37+15 32=37-5 42=37+5 22X32X42X52 =22X52X42X32 =(37-15)X(37+15 )X(37+5)X(37-5) =(37的平方-15的平方)X(37的平方-5的平方)

追问

谢谢

看懂了，谢谢

追答

给好评吧

追问

没问题