Question

vCompatible numbers for 2.4 and –0.18 are 2.5 and –0.2. What is the estimation of the product of (2.4)(–0.18) using these compatible numbers?
–0.5
–0.4
0.4
0.5

Answer 1

2.5 × (−0.2) = −0.5, so the estimate is −0.5.