Question

efetue
2x 3 oitavos
3x 5 21 avos
1 quinto x 30
1 doze avos x 21
7 quintos x 10 14 avos
1o oitavos x 16 quintos

Answer 1

Efetue: 2
1) 2 x 3/8= 6/8 somplific, divide o numerador e denominador por 2, dando:
6/8 (÷2) = 3/4

2) 3×5/21= 15/21 (simplificando ÷3)
15/21 (÷3) = 5/7

3) 1/5 ×30 = 30/5 = 6

4) 1/12 × 21= 21/12( simploficando ÷3) =
21/12= 7/4

5) 7/5× 10/14 = 70/70 = 1

6) 10/8 × 16/5 = 160/40 = (simplif. ÷40)= 4