Question

considere as expressões A (-1/2+2/3) × (2 - 1/4) B (-2+1/3) ÷(2/3-3) calcule o valor de A×B

Answer 1

(-1/2+2/3)×(2-1/4)=A
(-3/6+4/6)×(8/4-1/4) iguala a fração
+1/6×7/4
A=7/24

(-2+1/3)÷(2/3-3)=B
(-6/3+1/3)÷(2/3-3)
(-5/3)÷(2/3-9/3)
(-5/3÷7/3)
(-5/3×3/7)
(-15/21)simplifica por 3 = -5/7
-5/7=B

7/24×(-5/7)
-35/168= A×B simplifica por 7
-7/24= A×B