Valentine's Day Math Decimal Multiplication Color by Number Worksheet. Our Decimal Multiplication Color by Number Valentine's Day activity will engage your 4th, 5th, 6th, and 7th-grade students for early finishers, centers, enrichment, spiral review, and more! Designed for easy implementation and maximum enjoyment, this worksheet requires no prep for teachers!With Valentine's Day-themed illustrations and decimal multiplication problems, this worksheet combines the excitement of coloring with th