PSLE Ribbon problem

Fill in the Blank

Jess wants 200 ribbons of length 110 cm for a party. 

However, the ribbons were sold at 25 m per tape. 

How many tapes will Jess need?

Guiding questions to reflect on your problem solving process

Interpretation : Can you identify the information given in the question and what was required to be found?

Information:

(a) Required 200 ribbons of 110 cm each

(b) Given tapes of length 25 m each

Problem:

Find the number of tapes required to produce  the 200 ribbons.

Strategy : Can you think of a problem solving strategy that can be used to obtain the answer?  

Did you take into account the context of the problem?

Find the number of ribbons of 110 cm that can be obtained from one tape of 25000 cm.  

Hence find the number of tapes required to produce 200 ribbons.

Strategy 2

Find the total length of ribbon needed (110cm x 200 ribbons = 22 000cm).  

Divide the total length of ribbon needed by the length per tape to find the number of tapes needed to produce 200 ribbons.

Strategy 1

Reflect : Would  the 2 problem solving strategies below give the same result? Why or why not?