✅ Looking for a clear way to teach students how to estimate decimal sums and differences? This interactive Benchmark Decimal Fold-Up and scaffolded practice set for Grades 4–5 helps students use familiar benchmark decimals (0, 0.25, 0.50, 0.75, and 1) to estimate with confidence. Students learn how benchmark decimals act as reference points and use a decimal benchmark number line to determine which benchmark a number is closest to before estimating. With clear examples, visual models, and sc