Question

小学数学简便计算题

1：0.65*6.4-6.5*0.54+65*9%=
2：9999又1/5+999又1/5+99又1/5+9又1/5+4又4/5=

Answer 1

0.65*6.4-6.5*0.54+65*9%
=0.65(6.4-5.4+9)
=0.65*10=6.5

=9999+999+99+9+4+1/5+1/5+1/5+1/5+4/5
=(9999+1)+(999+1)+(99+1)+(9+1)+8/5
=10000+1000+100+10+8/5
=11110+1+3/5
=11111+3/5
=11111又5分之3

Answer 2

0.65*6.4-6.5*0.54+65*9%
=0.65(6.4-5.4+9)
=0.65*10=6.5

Answer 3

(1)0.65*6.4-6.5*0.54+65*0.09
=6.5*0.64-6.5*0.54+6.5*0.9
=6.5*(0.64-0.54+0.9)
=6.5*1=6.5

(2)=9999+999+99+9+4+1/5+1/5+1/5+1/5+4/5
=9999+999+99+9+4+1/5+1/5+1/5+1
=(9999+1)+(999+1)+(99+1)+(9+1)+1+3/5
=11111+3/5
=11111又3/5

Answer 4

(1)0.65*6.4-6.5*0.54+65*0.09
=6.5*0.64-6.5*0.54+6.5*0.9
=6.5*(0.64-0.54+0.9)
=6.5*1=6.5

(2)=9999+999+99+9+4+1/5+1/5+1/5+1/5+4/5
=9999+999+99+9+4+1/5+1/5+1/5+1
=(9999+1)+(999+1)+(99+1)+(9+1)+1+3/5
=11111+3/5
=11111又五分之三

Answer 5

1：0.65*6.4-6.5*0.54+65*0.09
=6.5*(0.64-0.54+0.9)
=6.5*1=6.5
2：9999又1/5+999又1/5+99又1/5+9又1/5+4又4/5
=9999+999+99+9+4+1/5+1/5+1/5+1/5+4/5
=（10000-1）+（1000-1）+（100-1）+（10-1）+4+1/5+1/5+1/5+1/5+4/5
=10000+1000+100+10-4+4+8/5
=11111+又3/5