Book WRITING NUMBERS AS WORDS / FACTORS & PRIME NUMBERS / PRIME FACTORS / ONE-NUMBER DIVISION / FINDING THE AVERAGE / PLACE VALUE / DECIMAL PLACE VALUE / ADDING & SUBTRACTING DECIMALS / ROUNDING OFF NUMBERS / TWO0 NUMBER & THREE NUMBER MULTIPLICATION / MULTIPLICATION OF DECIMALS / ROMAN NUMBERS / TWO-NUMBER DIVISION / ENGLISH & METRIC MEASUREMENT / MEASUREMENT & TIME / DIVISION OF DECIMALS / GRAPHING.