Question

Estimate the following expressions to the nearest whole number. Show your work.

√8+√18
2.
√14 + √26
3.
√9+√10
10.
2.8 +4.2
3+4
7
11+√80
7. V121+5
√62 +10
5. 100-2
8.
4-√5 +3
11. √225-8
6. √105-9
9. √99+√144
12. √300-1

Answer 1

Explanation:

1. √8 + √18

= √9 + √16

= √3² + √4²

= 3 + 4 = 7

2. √14 + √28

= √16 + √25

= √4² + √5²

= 4 + 5 = 9

3. √9 + √10

= √9 + √9

= √3² + √3²

= 3 + 3 = 6

10. 2.8 + 4.2

= 3 + 4 = 7

11 + √80

= 11 + √81

= 11 + √9²

= 11 + 9 = 20

√121 + 5

= √11² + 5

= 11 + 5 = 16

√62 + 10

= √64 + 10

= √8² + 10

= 8 + 10 = 18

√5 + 3

= √4 + 3

= √2² + 3

= 2 + 3 = 5

√225 - 8

= √15² - 8

= 15 - 8 = 7

√105 - 9

= √100 - 9

= √10² - 9

= 10 - 9 = 1

√99 + √144

= √100 + √144

= √10² + √12²

= 10 + 12 = 22

√300 - 1

= √324 - 1

= √18² - 1

= 18 - 1 = 17