用简便方法计算: 199999+19999+1999+199+19帮我解答一下

2025-02-25 16:13:27
推荐回答(5个)
回答1:

(1)999×87.5+87.5=87.5×(999+1)=87.5×1000=87500(2)199999+19999+1999+199+19=200000-1+20000-1+2000-1+200-1+20-1=222220-5=222215

回答2:

①100000÷32÷125÷25,=100000÷(32×125×25),=100000÷(4×8×125×25),=100000÷[(8×125)×(4×25)],=100000÷[1000×100],=100000÷100000,=1;②199999+19999+1999+199+19,=(199999+1)+(19999+1)+(1999+1)+(199+1)+(19+1)-5,=2000...

回答3:

19+199+1999+19999+199999 =20-1+200-1+2000-1+20000-1+200000-1 =222220-5 =2222215

回答4:

=200000+20000+2000+200+20-1×5
=222220-5
=222215

回答5: