Respuesta:
3/8 + ¼ =
3/8 + 2/8 = 5/8
3/9 + 1/3 =
3/9 + 3/9 = 6/9 ÷2
1.5 +3.2 = 4.7
10 – 2.5 = 7.5
5.4 + 2.7 =8.1
3.9 + 1.1 =5
½ - ¼ =
2/4 - 1/4 = 3/4
¼ + ¼ + ½ =
1/4 + 1/4 + 2/4 = 4/4 => 1
¾ - ½ =
3/4 - 2/4 = 1/4
9/10 – 2/5 =
9/10 - 4/10 = 5/10 ÷ 5 => 1/2
8/12 + 1/6 =
8/12 + 2/12 = 10/12 ÷ 2 => 5/6
4/12 + 1/6 =
4/12 + 2/12 = 8/12 ÷ 4 => 2/3
20 – 7.7 = 12.3
15.4 + 5.4 = 20.8
