Which calculation does NOT show how to mentally calculate 16 × 25?
A) 4 × 4 × 5 × 5 = 4 × 5 × 4 × 5 = 20 × 20 = 400
B) (10 × 25) + (6 × 25) = 250 + 150 = 400
C) (16 × 20) + (16 × 5) = 320 + 80 = 400
D) 4 × 100 = 400
E) This calculation is impossible to do mentally.
Correct Answer:
Verified
Q2: For each of the following, mentally
Q3: Give the exact answer mentally: 73.8 +
Q4: Describe how you would mentally compute the
Q5: Show how you would mentally compute the
Q6: Show how you would mentally compute each
Q7: Give the exact answer by mental calculation,
Q8: A person can reasonably calculate the exact
Q9: A person who is calculating the exact
Q10: For each, describe two different strategies for
Q11: Determine each calculation mentally, writing enough to
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents