The 4 operations with positive rational numbers including fractions, decimals...

Quick preparation

• use the 4 operations with positive rational numbers including fractions, decimals and percentages to solve problems using efficient calculation…
• solving addition and subtraction problems involving fractions and decimals; for example, using rectangular arrays with dimensions equal to the…
• choosing an appropriate numerical representation for a problem so that efficient computations can be made, such as 12.5%, \frac18, 0.125 or…