(9分之7-18分之5)×(8分之5+4分之3)= (32+23分之8÷8-23分之1= 30-16.72-13.28=
(7-5分之4×4分之3)÷5分之3=7.2×102=724-56×32÷28=5.4×14+15×5.4+5.4=20×21分之20+21分之20+8分之5=都是简便计...
(7-5分之4×4分之3)÷5分之3= 7.2×102= 724-56×32÷28= 5.4×14+15×5.4+5.4= 20×21分之20+21分之20+8分之5= 都是简便计算!
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简便计算
(9分之7-18分之5)×(8分之5+4分之3)
解,得:
==(1/2)*(11/8)
==11/16
(32+23分之8÷8-23分之1
解,得:
==
30-16.72-13.28
解,得:
==30-(16+0.72)-(13+0.28)
==30-16-0.72-13-0.28
==30-(16+13)-(0.72+0.28)
==30-29-1
==0
(7-5分之4×4分之3)÷5分之3
解,得:
==(7-0.6)*(5/3)
==32/3
7.2×102
解,得:
==72*(100+2)
==7200+144
==7344
724-56×32÷28
解,得:
==724-2×32
==724-64
==660
5.4×14+15×5.4+5.4
解,得:
==5.4×(14+15+1)
==5.4*30
==162
20×21分之20+21分之20+8分之5
解,得:
== 21分之20(20+1)+8分之5
== 21分之20*21+8分之5
== 20+8分之5
==20又5/8
(9分之7-18分之5)×(8分之5+4分之3)
解,得:
==(1/2)*(11/8)
==11/16
(32+23分之8÷8-23分之1
解,得:
==
30-16.72-13.28
解,得:
==30-(16+0.72)-(13+0.28)
==30-16-0.72-13-0.28
==30-(16+13)-(0.72+0.28)
==30-29-1
==0
(7-5分之4×4分之3)÷5分之3
解,得:
==(7-0.6)*(5/3)
==32/3
7.2×102
解,得:
==72*(100+2)
==7200+144
==7344
724-56×32÷28
解,得:
==724-2×32
==724-64
==660
5.4×14+15×5.4+5.4
解,得:
==5.4×(14+15+1)
==5.4*30
==162
20×21分之20+21分之20+8分之5
解,得:
== 21分之20(20+1)+8分之5
== 21分之20*21+8分之5
== 20+8分之5
==20又5/8
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