question_answer

Directions: Solve the word problems based on the operations of numbers. Jaya's science class places weights on a scale during on experiment. Each weight weighs 8.4 kilograms. If the class puts 2 weights on the scale at the same time what will the scale read?

A) 16.8   

B) 16.2            

C) 15.8                            

D) 10.4

Correct Answer: A

Solution :

Multiply the weight of each weight by the number of weights. Multiply as you would multiply whole numbers. Count the number of decimal places in the factors. There is 1 decimal place in 8.4. Move the decimal point 1 place to the left in the answer. 168=16.8 The scale will read 16.8 kilograms.