How many nickels, at $0.05 each, are there in $4?

1. Dividing by 0.05 is the same as asking how many groups of 0.05 fit into the total. 2. Move the decimal point in the divisor 0.05 two places to the right to make it a whole number, 5, and do the same to the dividend, turning 4 into 400. 3. Divide 400 by 5, which gives 80. 4. So there are 80 nickels in $4. _Source: OpenStax Prealgebra (CC BY 4.0), Ch 5 "Decimals", section 5.2 Decimal Operations_