Siri round each number to the place of the underlined digit 7.158 The underlined number is five

Keisha makes a large sandwich for a family picnic she takes 1/2 of them the sandwich to the picnic her family eats 3/8 of the whole sandwich what fraction of the whole sandwich does keisha bring back from the picnic

Explain how you can use the associative property to evaluate (7x50)x4.

What are the first 4 terms in the multiplication pattern given by the formula 2×4n