1. -150-12 kali 10:3= 2. (-15+45)kali 27:30= 3. -15 kali (25)+(-23)-(-130)= 4. -20-(-30)kali(-5)=

1. -150 - ( 12 x 10 ) : 3
= -150 - ( 120 : 3 )
= -150 - 40
= -190

2. ( -15 + 45 ) x 27 : 30
= ( 30 x 27 ) : 30
= 810 : 30
= 27

3. (( -15 x ( 25 )) + ( -23 ) - ( -130 )
= -375 - 23 + 130
= -398 + 130
= -268

4. -20 - (( -30 ) x ( -5 ))
= -20 - 150
= -170

Mapel : Matematika
Kelas : III SD
Bab : Bilangam Bulat

Pembahasan :
Ingat ! Jika perkalian dan pembagian berada pada pd satu operasi, maka utamakan pengerjaan dari kiri

1.

-150 - 12 x 10 : 3
= -150 - (12 x 10 : 3)
= -150 - (120 : 3)
= -150 - (40)
= -150 - 40
= -(150 + 40)
= -190

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2.

(-15 + 45) x 27 : 30
= (30 x 27 : 30)
= (30 x 27 x 1/30)
→→ Coret 30 ←←
= 27

————————————————
3.

-15 x 25 + (-23) - (-130)
= (-15 x 25) - 23 + 130
= -375 - 23 + 130
= -398 + 130
= -268

————————————————
4.

-20 - (-30) x (-5)
= -20 - (-30 x -5)
= -20 - 150
= -(20 + 150)
= -170