Estimate Answer by Rounding Numbers to the Nearest Ten

question 214

Multiple Choice

Estimate answer by rounding numbers to the nearest ten. Then find the exact answer. A welder uses 88 welding rods for his first job and 19 welding rods for a second job. How many more rods did he use for the first job?

• A)60 rods; 69 rods
• B)70 rods; 69 rods
• C)70 rods; 71 rods
• D)60 rods; 79 rods

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Definitions:

Self-report

A method in research where participants provide data or information about themselves, often through questionnaires or interviews.

Observational

Pertains to learning or gathering information by watching others or noticing events without direct involvement.

Interaction Process Analysis (IPA)

A method for observing and categorizing the interactions within small groups to understand their dynamics.

SYMLOG

A system for the multiple level observation of groups, which is a methodology used to assess group and individual behavior by evaluating three dimensions: dominance/submissiveness, friendliness/unfriendliness, and instrumentally controlled/emotionally expressive.