A Jackie knit a scarf as a Mothers Day gift She bought 5 bal

A. Jackie knit a scarf as a Mother\'s Day gift. She bought 5 balls of yarn that were each 185 yards long. To knit the scarf, she only needed 770 yards of yarn. How much yarn did she have left after she knit the scarf?

B. Darren has 16 pens. All of the pens are either blue or black, and there are 2 more blue pens than black pens. How many black pens does Darren have?

C. Subtract: 5 tbsp 1 tsp – 3 tbsp 2 tsp =

How many tbsp?

How many tsp?

Solution

A)

yarn she have left after she knit the scarf =(5*185)-770

yarn she have left after she knit the scarf =925-770

yarn she have left after she knit the scarf =155 yards of yarn

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B)

let number of back pens = x

there are 2 more blue pens than black pens

=> number of blue pens = x+2

darren has 16pens in total

so

x+ (x+2)=16

=>2x+2 =16

=>2x 16-2

=>2x =14

=>x=14_/2

=>x =7

so the darren has 7 black pens

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C)

1tbsp =3tsp

5 tbsp 1 tsp – 3 tbsp 2 tsp =4 tbsp (3+1) tsp – 3 tbsp 2 tsp

5 tbsp 1 tsp – 3 tbsp 2 tsp =4 tbsp 4 tsp – 3 tbsp 2 tsp

5 tbsp 1 tsp – 3 tbsp 2 tsp =(4-3) tbsp (4-2) tsp

5 tbsp 1 tsp – 3 tbsp 2 tsp =1 tbsp 2 tsp

or

5 tbsp 1 tsp – 3 tbsp 2 tsp =(5_/3) tbsp

or

5 tbsp 1 tsp – 3 tbsp 2 tsp =5 tsp