Why is this student NOT showing good number sense in estimating 249.738 + 48.246?
"Well, 249 is about 250, and 48 is about 50. 250 + 50 is 300. Then .738 + .246 is about 1. So, my estimate is 301."
Correct Answer:
Verified
Q13: Show how you would estimate:
A) 391 ×
Q14: Using benchmarks, find an estimate of
Q15: Joe Blue was estimating 92 × 31.
Q16: For each calculation, mentally obtain an estimate
Q17: Is 40 ÷ 1.99 less than, equal
Q19: 0.7614987 × 159.23842 is about:
A) 1.2.
B) 12.
C)
Q20: 1.334496 × 301.66 is CLOSEST to:
A) 400.
B)
Q21: 278.4132987 × 0.2617944285 is about:
A) 7.
B) 70.
C)
Q22: 0.3347876 × 629.847291143 is CLOSEST to:
A) 1800.
B)
Q23: Use number sense in locating the decimal
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