1、(1)32.6×1/5+17.4×20%
=6.52+17.4×0.2
=6.52+3.48
=10
(2)3/4+37/7×1/4+26/7÷4
=3/4+37/7×1/4+26/7×1/4
=3/4+1/4×(37/7+26/7)
=3/4+1/4×63/7
=3/4+9/4
=12/4
=3
2、(1)5*(x-1/3)=2
x-1/3=2/5
x=1/3+2/5
x=5/15+6/15
x=11/15
(2)2x+40%x=7.2
2x+0.4x=7.2
2.4x=7.2
x=3
1、(1)32.6×1/5+17.4×20%
=6.52+17.4×0.2
=6.52+3.48
=10
(2)3/4+37/7×1/4+26/7÷4
=3/4+37/7×1/4+26/7×1/4
=3/4+1/4×(37/7+26/7)
=3/4+1/4×63/7
=3/4+9/4
=12/4
=3
2、(1)5*(x-1/3)=2
x-1/3=2/5
x=1/3+2/5
x=5/15+6/15
x=11/15
(2)2x+40%x=7.2
2x+0.4x=7.2
2.4x=7.2
x=3