33*34+34*35+35*36+36*37=怎样简便运算?

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33*34+34*35+35*36+36*37=怎样简便运算?

33*34+34*35+35*36+36*37=怎样简便运算?
33*34+34*35+35*36+36*37=
怎样简便运算?

33*34+34*35+35*36+36*37=怎样简便运算?
(33+35)*34+(35+37)*36
=68*34+72*36
=2312+2592
=4904
(33+35+35+37)*34+(35+37)*(36-34)
=4760+72*2
=4760+144
=4904
(33+35+35+37)*36-(33+35)*(36-34)
=5040-68*2
=5040-136
=4904