7.8+31.39+6.95
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0.25+0.27
When the fractional parts, if any, of the two decimal numbers sum to 1.
First, round the highest place value of each number: 400+200+700=1300 Second, round the second highest place value of each number: 390+190+740=1320 The range to estimate the sum is 1300 to 1320. The actual sum is 1321, which higher than the range. However, the actual sum may lie within the obtained range. LEF
This will happen if the fractional parts of the numbers sum to 1.
The data wasn't provided to answer this question. The range in math is the highest number minus the lowest number. For example 30,20,10,5 the range would be 30 minus 5 which equals 25.