Ben can type 153 words in 3 minutes. at this rate, how many words can he type in 10 minutes

So in 3 minutes = 153 words
then in 1 minute 153/3 = 51 words per minute

Then for 10 minutes = 51 × 10 = 510

Ben can type 510 words in 10 minutes

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post