Topic E: Two- and three-digit measurement subtraction using the standard algorithm
Topic E includes lessons 18-21. "Decompose once to subtract measurements including three-digit minuends with zeros in the tens or ones place. Decompose twice to subtract measurements including three-digit minuends with zeros in the tens and ones places. Estimate differences by rounding and apply to solve measurement word problems. Estimate sums and differences of measurements by rounding, and then
