which are these answers are obviously incorrect? use estimates to identify them. show how many you estimated the answer:37*21=777;6091/33=1845;[816+214]/[103+4,9]=1,97;11*603-3*240=519.
The obviously incorrect answers can be estimated as follows:
1) 37*21=777 (Estimated: 700). The estimated answer of 700 is lower than the given answer of 777.
2) 6091/33=1845 (Estimated: 200). The estimated answer of 200 is lower than the given answer of 1845.
3) [816+214]/[103+4,9]=1,97 (Estimated: 4). The estimated answer of 4 is higher than the given answer of 1.97.
4) 11*603-3*240=519 (Estimated: 6500). The estimated answer of 6500 is higher than the given answer of 519.
Therefore, the obviously incorrect answers are:
- 37*21=777 (Estimated: 700)
- 6091/33=1845 (Estimated: 200)
- [816+214]/[103+4,9]=1,97 (Estimated: 4)
- 11*603-3*240=519 (Estimated: 6500)