Use benchmarks to estimate each sum or difference
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9/10 1/8=? A:about 1/2.B:about 1.C:about 1 1/2.D:about 2.
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Use benchmarks to estimate each sum or difference
-------------------------------------------------
9/10 1/8=? A:about 1/2.B:about 1.C:about 1 1/2.D:about 2.
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