65*99+65*22+65= 怎麼簡便運算
題目:
65*99+65*22+65= 怎麼簡便運算
解答:
65*99+65*22+65
=65×99+65×﹙20+2﹚+65×1
=65×﹙99+1﹚+65×20+65×2
=65×100+1300+130
=6500+1300+130
=7800+130
=7930
題目:
65*99+65*22+65= 怎麼簡便運算
解答:
65*99+65*22+65
=65×99+65×﹙20+2﹚+65×1
=65×﹙99+1﹚+65×20+65×2
=65×100+1300+130
=6500+1300+130
=7800+130
=7930
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