Ontario Curriculum Expectation:
3.B2.3 use mental math strategies, including estimation, to add and subtract whole numbers that add up to no more than 1000, and explain the strategies used
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1 of 101. Question
1. Estimate the sum by rounding each number to the nearest tenth to solve.
Â Â Â 44 + 39 = ?Â Â Â
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2 of 102. Question
2. Estimate the sum by rounding each number to the nearest tenth to solve.
Â Â Â 71 + 16 = ?
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3 of 103. Question
3. Estimate the sum by rounding each number to the nearest hundredth to solve.
Â Â Â 305 + 199 = ?
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4 of 104. Question
4. Estimate the sum by rounding each number to the nearest hundredth to solve.
Â Â Â 487 + 124 = ?Â
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5 of 105. Question
5. Estimate the sum by rounding each number to the nearest tenth to solve.
Â Â Â 14 + 52 = ?
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6 of 106. Question
6. Estimate the sum by rounding each number to the nearest tenth to solve.
Â Â Â 88 + 32 = ?
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7 of 107. Question
7. Estimate the sum by rounding each number to the nearest hundredth to solve.
Â Â Â 640 + 209 = ?
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8 of 108. Question
8. Estimate the sum by rounding each number to the nearest tenth to solve.
Â Â Â 49 + 52 = ?
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9 of 109. Question
9. Estimate the sum by rounding each number to the nearest hundredth to solve.
Â Â Â 131 + 875 = ?
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10 of 1010. Question
10. Estimate the sum by rounding each number to the nearest hundredth to solve.
Â Â Â Â 368 + 259 = ?
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