1. 350 hg = kg 2. 15 kg - 5 kg= ons 3. 80 pon - 20 kg = kg 4. 7 kg - 50 hg = hg 5. 90 pon - 40 pon = kg 6. 30 pon + 50 pon = kg 7. 5 pon + 3 pon = ons 8. 300 kg

1)350÷10=35

2)(15×10)-(5×10)=
=150-50
=50

3)[(5×80)÷10]-20
=[300÷10]-20
=30-20
=10

4)(7×10)-50=
=70-50
=20

5)[(90×5)÷10]-[(40×5)÷10]=
=[450÷10]-[200÷10]
=45-20
=25

6)[(30×5)÷10]+[(50×5)÷10]=
=[150÷10]+[250÷10]
=15+25
=40

7)(5×5)+(3×5)=
=25+15
=40

8)[(300×10)÷5]-[(250×10)÷5]=
=[3.000÷5]-[2.500÷5]
=600-500
=100

9)50-[(80×5)÷10]=
=50-[400÷10]
=50-40
=10

10)[(80×10)÷5]-60=
=[800÷5]-60
=160-60
=100