Online worksheet ยท 2 of 4
Use endpoints that maximise the expression - Online practice 2
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Positive lengths a and b display 8 cm and 3 cm, each rounded to the nearest centimetre using halfway-up rounding. Thus 7.5 <= a < 8.5 and 2.5 <= b < 3.5. Keep endpoint inclusion explicit; the displayed values are not exact.
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- Give the interval for a+b from the displayed 8 cm and 3 cm.
- Give exact lower and upper limiting bounds for a/b, and state whether either is attained.
- Why must the numerator and denominator endpoints be chosen differently for a quotient?
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