((1/2)+(1/6))×15 помогите

Question

((1/2)+(1/6))×15 помогите

Answer 1

=(3/6 + 1/6) * 15= 4/6 * 15=2/3 * 15=10
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Answer 2

(1/2+1/6)×15=(6/12+2/12)×15=15×8/12=120/12=10