36*45+3856-36简便运算？
36*45+3856-36
=36*45+3820
=20*(81+191)
=20*272
=5440
36×45+3856-36
=4×9×5×9+3820
=4×5×9×9+3820
=20×81+3820
=1620+3820
=5440
或
36×45+3856-36
=36×45-36+3856
=36×（45-1）+3856
=36×44+3856
=4×9×4×11+3856
=16×99+3856
=16×（100-1）+3856
=1600-16+3856
=1600+3840
=5440
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