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what will make this equation true? (4+5) +6 =4+_____

A.(5+6)
B.(5+4)
C.(5+5)
D.(4+5)


Sagot :

Answer:

A

Step-by-step explanation:

(4+5)+6=4+(5+6)

(9)+6 = 4 +(11)

15 = 15

they are equal, so 5+6 make the equation true