25:5+79=
=5+79
=84
------------------
30:5-6=
=6-6
=0
-------------------
84+40:5=
=84+8
=92
-------------------
70-20:5=
=70-4
=66
-------------------
40:5×9-38=
=8×9-38
=72-38
=34
-------------------
19+27:3×7=
=19+9×7
=19+63
=82
-------------------
100-19-45:9=
=100-19-5
=71-5
=66