Question

Calcule
a) 3/5+6/5= b)2/3-1/4=c) 5/6+4/5= d) 4/5-2/3=
sem respostas bobas prfvr :)♡​

Answer 1

Olá!!!

Vamos calcular sem usar mmc, pelo método borboleta:

a/b + c/d = a×d+c×b/b×d

Funciona com subtração

a) 3/5 + 6/5 ← Mesma denominador logo só somar

3+6/5

9/5

b) 2/3 - 1/4

2×4-1×3/3×4

8-3/12 ← Subtraindo

5/12

c) 5/6 + 4/5

5×5+4×6/6×5

25+24/30 ← Somando

49/30

d) 4/5 - 2/3

4×3-2×5/5×3

12-10/15 ← Subtraindo

2/15