Compatible numbers for 2 point 4 and negative 0 point 1 8 are 2 point 5 and negative 0 point 2 What is the estimation of the product of 2 point 4 times negative 0 point 1 8 using these compatible numbers?
Answer
A
negative 0 point 4
B
negative 0 point 5
C
0 point 4
D
0 point 5
Explanation
Use the compatible numbers 2.5 and −0.2 in place of 2.4 and −0.18. Their product is 2.5 × (−0.2) = −0.5. Therefore, the estimate is negative 0.5, choice B.
AI-written and checked against the verified answer.