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Worksheet6E 9
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Question 1 of 10
1. Question
Estimate the sum of 6666 and 3333 to nearest tens.
Correct
Explanation:
Sum of 6666 and 3333 = 6666 + 3333
6666 rounded off to nearest tens = 6670
3333 rounded off to nearest tens = 3330
6670 + 3330 = 10000Incorrect
Correct Answer: 10000
Explanation:
Sum of 6666 and 3333 = 6666 + 3333
6666 rounded off to nearest tens = 6670
3333 rounded off to nearest tens = 3330
6670 + 3330 = 10000 
Question 2 of 10
2. Question
Estimate the sum of 1565 and 2058 to nearest tens.
Correct
Explanation:
Sum of 1565 and 2058 = 1565 + 2058
1565 rounded off to nearest tens = 1570
2058 rounded off to nearest tens = 2060
1570 + 2060 = 3630Incorrect
Correct Answer: 3630
Explanation:
Sum of 1565 and 2058 = 1565 + 2058
1565 rounded off to nearest tens = 1570
2058 rounded off to nearest tens = 2060
1570 + 2060 = 3630 
Question 3 of 10
3. Question
Estimate the sum of 125 and 742 to nearest tens.
Correct
Explanation:
Sum of 125 and 742 = 125 + 742
125 rounded off to nearest tens = 130
742 rounded off to nearest tens = 740
130 + 740 = 870Incorrect
Correct Answer: 870
Explanation:
Sum of 125 and 742 = 125 + 742
125 rounded off to nearest tens = 130
742 rounded off to nearest tens = 740
130 + 740 = 870 
Question 4 of 10
4. Question
Estimate the sum of 3310 and 6534 to nearest tens.
Correct
Explanation:
Sum of 3310 and 6534 = 3310 + 6534
3310 rounded off to nearest tens = 3310
6534 rounded off to nearest tens = 6530
3310 + 6530 = 9840Incorrect
Correct Answer: 9840
Explanation:
Sum of 3310 and 6534 = 3310 + 6534
3310 rounded off to nearest tens = 3310
6534 rounded off to nearest tens = 6530
3310 + 6530 = 9840 
Question 5 of 10
5. Question
Estimate the sum of 52 and 89 to nearest tens.
Correct
Explanation:
Sum of 52 and 89 = 52 + 89
52 rounded off to nearest tens = 50
89 rounded off to nearest tens = 90
50 + 90 = 140Incorrect
Correct Answer: 140
Explanation:
Sum of 52 and 89 = 52 + 89
52 rounded off to nearest tens = 50
89 rounded off to nearest tens = 90
50 + 90 = 140 
Question 6 of 10
6. Question
Estimate the sum of 8774 and 448 to nearest tens.
Correct
Explanation:
Sum of 8774 and 448 = 8774 + 448
8774 rounded off to nearest tens = 8770
448 rounded off to nearest tens = 450
8770 + 450 = 9220Incorrect
Correct Answer: 9220
Explanation:
Sum of 8774 and 448 = 8774 + 448
8774 rounded off to nearest tens = 8770
448 rounded off to nearest tens = 450
8770 + 450 = 9220 
Question 7 of 10
7. Question
Estimate the sum of 19874 and 74389 to nearest tens.
Correct
Explanation:
Sum of 19874 and 74389 = 19874 + 74389
19874 rounded off to nearest tens = 19870
74389 rounded off to nearest tens = 74390
19870 + 74390 = 94260Incorrect
Correct Answer: 94260
Explanation:
Sum of 19874 and 74389 = 19874 + 74389
19874 rounded off to nearest tens = 19870
74389 rounded off to nearest tens = 74390
19870 + 74390 = 94260 
Question 8 of 10
8. Question
Estimate the sum of 54682 and 32499 to nearest tens.
Correct
Explanation:
Sum of 54682 and 32499 = 54682 + 32499
54682 rounded off to nearest tens = 54680
32499 rounded off to nearest tens = 32500
54680 + 32500 = 87180Incorrect
Correct Answer: 87180
Explanation:
Sum of 54682 and 32499 = 54682 + 32499
54682 rounded off to nearest tens = 54680
32499 rounded off to nearest tens = 32500
54680 + 32500 = 87180 
Question 9 of 10
9. Question
Estimate the sum of 20341 and 5905 to nearest tens.
Correct
Explanation:
Sum of 20341 and 5905 = 20341 + 5905
20341 rounded off to nearest tens = 20340
5905 rounded off to nearest tens = 5910
20340 + 5910 = 26250Incorrect
Correct Answer: 26250
Explanation:
Sum of 20341 and 5905 = 20341 + 5905
20341 rounded off to nearest tens = 20340
5905 rounded off to nearest tens = 5910
20340 + 5910 = 26250 
Question 10 of 10
10. Question
Estimate the sum of 90023 and 540023 to nearest tens.
Correct
Explanation:
Sum of 90023 and 540023 = 90023 + 540023
90023 rounded off to nearest tens = 90020
540023 rounded off to nearest tens = 540020
90020 + 540020 = 630040Incorrect
Correct Answer: 630040
Explanation:
Sum of 90023 and 540023 = 90023 + 540023
90023 rounded off to nearest tens = 90020
540023 rounded off to nearest tens = 540020
90020 + 540020 = 630040