981*49+981+9810*5怎么简便

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981*49+981+9810*5怎么简便981*49+981+9810*5怎么简便981*49+981+9810*5怎么简便981*49+981+9810*5=981*49+981+981*50=9

981*49+981+9810*5怎么简便
981*49+981+9810*5怎么简便

981*49+981+9810*5怎么简便
981*49+981+9810*5
=981*49+981+981*50
=981*(49+1+50)
=981*100
=98100

981*49+981+9810*5
=981*49+981+981*50
=981*(49+1+50)
=981*100
=9810