Question

Tolong bantu saya ya ...

Answer 1

3. 3/4 + 3 1/5 - 2 = (15/20 + 3 4/20) - 2=3 19/20-2=1 19/20

4. (5 + 2,25) - 1/5 = 7,25 - 1/5 = 7,25 - (1/5 × 2/2) = 7,25 - 0,2 = 7,05

5. 1 3/8 - 40% + 7 = (1+7)+(3/8-40%) = 8+(3/8-40/100) = 8+3/8-2/5 = 8 + 15/40 + 16/40=
8 31/40

6. 12-5 5/8 + (16%-0,2) =12-5 5/8 + (0.16-0,2)=
(7 5/8 + 16/100) - 2/10 = (7 250/400 + 64/400) - 2/10 = 7 186/400 - 2/10 = 7 186/400 - 80/400=
7 106/400 = 7 53/200

7. (6 + 4/8) - (7 - 125%)
6 4/8 - (7 - 0,125)
6 4/8 - 6,875
6,5 - 6,875 = -0,375 (tanda min - berarti negatif)

8. (4,2 - 30%) + (3 2/3 - 2)
(4,2 - 0,3) + 1 2/3
3,9 + 1 2/3 =3 9/10 + 1 2/3 = 4 + (27/30 + 20/30) = 4 47/30 = 5 17/30

9. 2,8 + 10% - (1 - 3/4) =
2,9 - (1/1 - 3/4) = 2,9 - (4/4 - 3/4) = 2,9 - 1/4 =
2 9/10 - 1/4 = 2 + (36/40 - 10/40) = 2 26/40 kalo di sederhanakan menjadi 2 13/20

10. (8 + 6/8) - (5 -12,5%) = 8 6/8 - (5 - 125/10) =
8 6/8 - 5 - 12 1/2 = 8 - 5 - 12 = -9
6/8 - 1/2=12/16 - 8/16=4/16

jawaban -9 4/16 kalo di sederhanakan -9 1/4