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Simplification & Approximation · Question 16 of 71

Question 16

MediumOriginal question

Evaluate 0.5×18+36÷0.4−70.5 \times 18 + 36 \div 0.4 - 7.

Options for question 16

Show the answer and explanation
CorrectNot quiteAnswer B

Correct answer: B

Explanation

  1. 0.5×18=90.5 \times 18 = 9.

  2. 36÷0.4=360÷4=9036 \div 0.4 = 360 \div 4 = 90.

  3. Then 9+90−7=929 + 90 - 7 = 92.

Worth noting

Dividing by a decimal less than 1 makes a number bigger. Writing 36÷0.4=936 \div 0.4 = 9 leads to 11.

Concept
Order of operations with decimals
Typical time
50 s
Your time
—
The rule this testsOrder of operations (BODMAS)
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