21×32+32×36+57×68+43×100怎么简便运算?

2025-12-17 21:48:55
推荐回答(4个)
回答1:

简便运算:21×32+32×36+57×68+43×100=32X (21+36)+57×68+43×100=57×32+57×68+43×100=57×(32+68)+43×100=57×100+43×100=(57+43)×100=100×100=10000

回答2:

21×32+32×36+57×68+43×100
=(21+36)×32+57×68+43×100
=57×32+57×68+43×100
=57×(32+68)+43×100
=57×100+43×100
=(57+43)×100
=100×100
=10000

回答3:

21X32+32X36+57X68+43X100
=32X(21+36)+57X68+43X100
=32X57+57X68+43X100
=57X(32+68)+43X100
=57X100+43X100
=(57+43)X100
=100X100
=10000

回答4:

这种事故?这么!;一定程度很大气污染源排放总量