199+1999+19999+3742-98怎樣簡便計算
題目:
199+1999+19999+3742-98怎樣簡便計算
怎樣算呢?
解答:
199+1999+19999+3742-98
=200-1+2000-1+20000-1+3742-100+2
=22100+3742-1
=22100+3741
=25841
題目:
199+1999+19999+3742-98怎樣簡便計算
怎樣算呢?
解答:
199+1999+19999+3742-98
=200-1+2000-1+20000-1+3742-100+2
=22100+3742-1
=22100+3741
=25841
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