221*97+221+442怎样简算
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![221*97+221+442怎样简算](/uploads/image/z/3756913-25-3.jpg?t=221%2A97%2B221%2B442%E6%80%8E%E6%A0%B7%E7%AE%80%E7%AE%97)
221*97+221+442怎样简算
221*97+221+442怎样简算
221*97+221+442怎样简算
221*97+221+442
=221*97+221+221*2
=221*(97+1+2)
=221*100
=22100
提一个221出来,变成221*(97+1+2)
221x97+221+442
=221x97+221x1+221x2
=221x (97+1+2)
=221x100
=22100