Sidney does 20 jumping jacks on Monday, 36 on Tuesday, 40 on Wednesday, and 50 on Thursday. Brooke does three times as many jumping jacks as Sidney. How many jumping jacks did Brooke do?
Sidney does 20 on Monday + 36 on Tuesday + 40 on Wednesday + 50 on Thursday = <<20+36+40+50=146>>146 jumping jacks.
Brooke does 3 x 146 = <<3*146=438>>438 jumping jacks.
#### 438