Unit 3 Lesson 5: Exercise 1
Estimate the following sums and differences and write the answers.
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Question 1 of 101. Question
1)
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1) 45 + 67 → 50 + =
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Question 2 of 102. Question
2)
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2) 115 + 98 → + 100 =
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Question 3 of 103. Question
3)
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3) 49 + 77 → 50 + =
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Question 4 of 104. Question
4)
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4) 259 + 104 → + =
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Question 5 of 105. Question
5)
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5) 91 + 66 → + =
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Question 6 of 106. Question
6)
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6) 111 – 102 → – =
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Question 7 of 107. Question
7)
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7) 994 – 467 → – =
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Question 8 of 108. Question
8)
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8) 494 – 243 → – =
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Question 9 of 109. Question
9)
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9) 201 – 53 → – =
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Question 10 of 1010. Question
10)
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10) 909 – 61 → – =
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