1.)-75×3+(-5)×(-25)=-225+125=-100
2.)750-(-2)×(-250)+(-50)=750-500+(-50)=250+(-50)=200
3.)2×(-75)+250-(300÷(-6))=-150+250-(-50)=100+50=150
Jawaban:
1. ((-75)×3)+((-5)×(-25))
= -225+125
= -100
2. 720-(-2)×(-250)+(-50)
= 720-((-2)×(-250))+(-50)
= 750-(500)+(-50)
= 750-500-50
= 200
3. 2×(-75)+250-(300÷(-6))
= (2×(-75))+250-(300÷(-6))
= (-150)+250-(-50)
= -150+250+50
= 150
Aturan:
1. perkalian/pembagian didahulukan dibandingkan penjumlahan/pengurangan
2. (-)(-) (min ketemu min) = (+)
3. (+)(+) (plus ketemu plus) = (+)
4. (-)(+) (min ketemu plus) = (-)
5. (-)×(-) (min kali/bagi min) = (+)
6. (+)×(+) (plus kali/bagi plus) = (+)
7. (-)×(+) (min kali/bagi plus) = (-)
8. dalam kurung didahulukan dibandingkan perkalian/pembagian
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1.)-75×3+(-5)×(-25)=-225+125=-100
2.)750-(-2)×(-250)+(-50)=750-500+(-50)=250+(-50)=200
3.)2×(-75)+250-(300÷(-6))=-150+250-(-50)=100+50=150
Jawaban:
1. ((-75)×3)+((-5)×(-25))
= -225+125
= -100
2. 720-(-2)×(-250)+(-50)
= 720-((-2)×(-250))+(-50)
= 750-(500)+(-50)
= 750-500-50
= 200
3. 2×(-75)+250-(300÷(-6))
= (2×(-75))+250-(300÷(-6))
= (-150)+250-(-50)
= -150+250+50
= 150
Aturan:
1. perkalian/pembagian didahulukan dibandingkan penjumlahan/pengurangan
2. (-)(-) (min ketemu min) = (+)
3. (+)(+) (plus ketemu plus) = (+)
4. (-)(+) (min ketemu plus) = (-)
5. (-)×(-) (min kali/bagi min) = (+)
6. (+)×(+) (plus kali/bagi plus) = (+)
7. (-)×(+) (min kali/bagi plus) = (-)
8. dalam kurung didahulukan dibandingkan perkalian/pembagian