A. Hitunglah hasil nya dalam bentuk pecahan biasa. 1. 1 3/8 + 5/12 - 0,2 =........ 2. 0,5 + 3/10 x 0,3 =........ 3. 15% x 2,5 - 3/10 : 0,5 =......... 4. 3 1/4 x

Jawabannya:

Mapel. : Matematika
Bab. : Operasi Pecahan
Sub Bab : Pecahan

Pembahasan:

1). 1 3/8 + 5/12 - 0,2
= 11/8 + 5/12 - 2/10
= 165/120 + 50/120 - 24/120
= 215/120 - 24/120
= 191/120 → Jwbnya

2). 0,5 + 3/10 × 0,3
= 5/10 + 3/10 × 3/10
= 5/10 + 9/100
= 50/100 + 9/100
= 59/100 → Jwbnya

3). 15% × 2,5 - 3/10 : 0,5
= 15/100 × 25/10 - 3/10 : 5/10
= 375/1000 - 3/10 : 5/10
= 375/1000 - 3/10 × 10/5
= 375/1000 - 30/50
= 375/1000 - 600/1000
= 225/1000
= 45/200
= 9/40 → Jwbnya

4). 3 1/4 × 2/5 : 0,6
= 13/4 × 2/5 : 6/10
= 26/20 × 10/6
= 260/120
= 65/30
= 13/6 → Jwbnya

5). 50% + 7,5 × 1/25 - 1 1/4
= 50/100 + 75/10 × 1/25 - 5/4
= 1/2 + 75/250 - 5/4
= 1/2 + 3/10 - 5/4
= 10/20 + 6/20 - 25/20
= 16/20 - 25/20
= -9/20 → Jwbnya

# Maaf Kalo Salah

1)1 3/8+5/12-0,2=11/8+5/12-1/5=165/120+50/120-24/120=191/120= 1 71/120.
2)0,5+3/10x0,3=1/2+3/10x3/10=1/2+9/100=50/100+9/100=59/100.
3)15%x2,5-3/10÷0,5=3/20x5/2-3/10÷1/2=3/8-3/5=15/40-24/40=(-9/40).
4)3 1/4x2/5÷0,6=13/4x2/5÷2/3=13/10x3/2=39/20=1 19/20. 5)50%+7,5x1/25-1 1/4=1/2+15/2x1/25-5/4=1/2+3/10-5/4=60/120+36/120-150/120=(-54/120)=(-9/20).
Maaf jika salah