1 1/4 + 3 2/5 - 3 1/2 ? (Kalau bisa pakai cara) :

1 1/4 + 3 2/5 - 3 1/2
1. 5/4 + 17/5 - 7/2
2. 25/20 + 68/20 - 70/20
3. 93/20 - 70/20
4. 23/20
5. 1 3/20
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Cara
1. 1 1/4 = 1 x 4 + 1/4 = 5/4
2. Samakan Penyebutnya
5. 23:20 = 1 Sisa 3, jadi 1 3/20

1 1/4 + 3 2/5 - 3 1/2 =(1+3-3)1/4 + 2/5 - 1/2
= (1+3-3) 5+8+10 / 20
= 1 23 / 20
= 2 3/20
semoga membantu