7.8*0.26=2.028
2.32:2.9=0.8
2.028-0.8=1.228
1.228+0.672=1.9
7,8×0,26-2,32:2,9+0,672=
=2,028-0,8+0,672=1,9.
7.8*0.26=2.028
2.32:2.9=0.8
2.028-0.8=1.228
1.228+0.672=1.9
7,8×0,26-2,32:2,9+0,672=
=2,028-0,8+0,672=1,9.