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Grade 5 Math · World 6: Fraction Market · Level 60
Estimate First
Use benchmarks to predict a sum or difference.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 60
- Before adding, think about the answer's size. 1 half plus 4 fifths: 4 fifths is close to 1, so the sum is near 1 and a half.
- Here's a common mistake. Some people add tops and bottoms, and say 1 half plus 1 third is 2 fifths.
- But 2 fifths is less than 1 half! Adding can't make it smaller. An estimate catches this right away.
Georgia's K-12 Mathematics Standards:
- 5.NR.3.3 — Model and solve problems involving addition and subtraction of fractions and mixed numbers with unlike denominators.