Hitunglah. 1. -2,4 : (-0,6) × 3 2. 7/12 – 4/9 – (-5/18) 3. -62 – (5 – 8)2
Hitunglah.
1. -2,4 : (-0,6) × 3
2. 7/12 – 4/9 – (-5/18)
3. -62 – (5 – 8)2
4. (-4)2 + 16 : (-42)
5. -5/14 + 6/7 × 1/3
6. 1/3 – (-7/8) : 7/2
7. 1/8 – (-3/4)2 : 3
8. 6 : (-3/2) + 5/2 × (-4)
Pembahasan:
1. -2,4 : (-0,6) × 3 = 4 × 3 = 12
2. 7/12 – 4/9 – (-5/18) = 21/36 – 16/36 + 10/36
= 15/36 = 5/12
3. -62 – (5 – 8)2 = -36 – (-3)2
= -36 – 9 = -45
4. (-4)2 + 16 : (-42) = 16 + 16 : (-16)
= 16 – 1 = 15
5. -5/14 + 6/7 × 1/3 = -5/14 + 2/7
= -5/14 + 4/14 = -1/14
6. 1/3 – (-7/8) : 7/2 = 1/3 + 7/8 × 2/7
= 1/3 + 1/4 = 4/12 + 3/14 = 7/12
7. 1/8 – (-3/4)2 : 3 = 1/8 – 9/16 × 1/3
= 1/8 – 3/16 = 2/16 – 3/16 = -1/16
8. 6 : (-3/2) + 5/2 × (-4) = 6 × (-2/3) – 10
= -4 – 10 = -14
Post a Comment for "Hitunglah. 1. -2,4 : (-0,6) × 3 2. 7/12 – 4/9 – (-5/18) 3. -62 – (5 – 8)2"