Question

下面各题怎样简便怎样算，不能简算的就不简算

5.8x4.5+4.5x3.2+4.5
=
=
4.7x9.9
=
=
16.25x5.2除以2.6
=
=
81除以4.5
=
=
4.83+1.25+0.6除以0.8
=
=

Answer 1

5.8x4.5+4.5x3.2+4.5
=4.5x(5.8+3.2+1)
=4.5
4.7x9.9
=4.7x(10-0.1)
=4.7X10-4.7X0.1
=47-0.47
=46.53
16.25x5.2除以2.6
=18.25X(5.2除以2.6）
=18.25X2
=36.5
81除以4.5
=9X9除以4.5
=9X0.2
=1.8

4.83+1.25+0.6除以0.8
=4.83+1除以0.8+0.6除以0.8
=4.83+（1+0.6）除以0.8
=4.83+1.6除以0.8
=4.83+2
=6.83

Answer 2

=4.5*（5.8+3.2+1）
=4.5*10
=45

=4.7*（10-0.1）
=4.7*10-4.7*0.1
=47-0.47
=46.53

=81/4.5
=（81*2）/（4.5*2）
=81*2/9
=18
其他的题不能简算

追问

那其他不能简算的也发一下

Answer 3

=4.5x(5.8+3.2+1)
=4.5x10
=45

=4.7x(10-0.1)
=47-0.47
=46.53

追问

还有其它三题呢

追答

=84.5÷2.6
=32.5

=81÷4.5
=（81*2）÷（4.5*2）
=81÷9x2
=18

=4.83+1.25+0.75
=4.83+(1.25+0.75)
=4.83+2
=6.83

Answer 4

1,4.5*（5.8+3.2+1）
=4.5*10
=45
2,4.7*10-4.7*0.1
=47-0.47
=46.53

追问

还有其它三题呢