QUESTION IMAGE
Question
estimate the sum using benchmarks.
\\(\frac{9}{10} + \frac{1}{7}\\)
1
\\(1\frac{1}{2}\\)
2
Step1: 估算第一个分数
$\frac{9}{10}$接近1,将其估算为1
Step2: 估算第二个分数
$\frac{1}{7}$接近0,将其估算为0
Step3: 计算估算的和
$1 + 0 = 1$
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