Fractions, Ratio, and Proportion Sequences
Make use of tens
4 1/2 * 50 = (4 * 10 * 5) + (1/2 * 10 * 5)
(40 * 5) + (5 * 5)
200 + 25Halve and doubles
4 1/2 * 50 =
50 doubled once = 100 and doubled again = 200
1/2 of 50 = 25or
double 4 1/2 and 1/2 50
9 * 25Get rid of the fraction
double 4 1/2 and half 50
9 * 25Use all the factors in pretty ways.
4 1/2 * 50 = 9 * 25 = 225
Or (4 * 50) + (1/2 * 50) = 200 + 25
Or (5 * 50) - (1/2 * 50) = 250 - 25 = 225
2 1/4 * 100
2 1/4 * 120
4 1/2 * 60
15 1/2 * 36 = (10 * 36) + (5 * 36) + (1/2 * 36) = 360 + (1/2 * 360) + 18 = 360 + 180 + 18
15 1/2 * 4 1/2 =Multiplication and Division of Fractions Sequence
Developing strategies for computation with decimals