(1)56+910+16+110,=(56+16)+(110+910),=1+1,=2;(2)(14+56)÷124,=(14+56)×24,=14×24+56×24,=6+20,=26;(3)37÷52+25×47,=37×25+25×47,=25×(37+47),=25×1,=25;(4)3-32×1021-27,=3-57?27,=3-(57+27),=3-1,=2.
52×27+47×27+27
=27×(52+47+1)
=27×100
=2700
乘法分配律
=52×27+47×27+1×27
=(52+47+1)×27
=100×27
=2700