45✘28+55✘88用简便方法解答
第1个回答 2020-05-22
=(100-55)X28+55X88
=28X100-55X28+55X88
=2800+55(88-28)
=2800+55X60
=6100
=28X100-55X28+55X88
=2800+55(88-28)
=2800+55X60
=6100
第2个回答 2020-05-22
45×28+55×88
=45×(30-2)+55x(90-2)
=1350-90+4950-110
=(1350+4950)-(90+110)
=6300-200
=6100
=45×(30-2)+55x(90-2)
=1350-90+4950-110
=(1350+4950)-(90+110)
=6300-200
=6100