461 P6.ST.JC.18121449
Level 3
Fill in the blanks in whole numbers or decimals.
2 boys, Adam and Bryan, share some stickers.
Bryan has 20% of the total stickers.
If Bryan receives extra stickers,
his number of stickers increases to 30%.

  1. Number of stickers that Bryan has at first = _____ u
  2. Change in the number of stickers that Bryan has = _____ u
  3. Number of stickers that Adam has at first = _____ u
  4. Number of stickers that Adam has in the end = _____ u
4 m
Percent of a whole Percent change to Percent to units Unchanged quantity Units table
462 P5.ST.JC.18121203
Level 3
The average cost of some books is $30.
When a book that costs $90 is added,
the average cost of the books becomes $40.
How many books are there in the end?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
463 P3.ST.JC.18120922
Level 3
For every 50 cupcakes that Adam bakes,
he bakes 30 muffins.
He bakes a total of 160 cupcakes and muffins.
  1. How many muffins does he bake?
  2. How many more cupcakes than muffins does he bake?
4 m
W 4 operations Proportion
464 P4.ST.JC.18120970
Level 2
The mass of a box with 4 marbles is 3.77 kg.
The mass of the empty box is 2.57 kg.
  1. What is the mass of each marble?
  2. What is the mass of a box with 7 marbles?
3 m
D 4 operations Model Part-whole Units method
465 P6.ST.JC.18121420
Level 3
Fill in the blanks.
Number of boys at first is 30% of the children.
Number of boys is then increased to 40%.

  1. Number of boys at first = _____ u
  2. Number of boys in the end = _____ u
  3. Increase in the number of boys = _____ u
  4. Number of children in the end = _____ u
4 m
Percent to units Percent change to Unchanged quantity Units table
466 P5.ST.JC.18121204
Level 3
The average cost of some books is $30.
When a book that costs $90 is removed,
the average cost of the books becomes $10.
How many books are there in the end?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
467 P3.ST.JC.18120923
Level 3
A pitcher can hold some ℓ of water.
Adam needs 4 pitchers of water to fill a tank completely.
A tank can hold 20ℓ of water.
  1. How many litres of water does a pitcher hold?
  2. How many pitchers of water are needed to fill 3 tanks?
4 m
W Multiplication & division Proportion
468 P4.ST.JC.18120971
Level 1
Adam saves $8.70.
He saves 3 times as much as Bryan.
How much more does Adam save than Bryan?
2 m
D 4 operations More than or less than Model Times-as-many Units method
469 P6.ST.JC.18121421
Level 3
Fill in the blanks.
Number of boys at first is 40% of the children.
Number of boys is then decreased to 30%.

  1. Number of boys at first = _____ u
  2. Number of boys in the end = _____ u
  3. Decrease in the number of boys = _____ u
  4. Number of children in the end = _____ u
4 m
Percent to units Percent change to Unchanged quantity Units table
470 P5.ST.JC.18121205
Level 3
The average cost of some books is $30.
If 3 of the books are now each $15 more,
the average cost of the books becomes $35.
How many books are there altogether?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
471 P3.ST.JC.18120924
Level 3
Adam buys 4 identical stickers and 4 marbles for $80.
How much will Adam pay if she buys 5 such stickers and marbles?
4 m
W Multiplication & division Proportion Units & parts
472 P4.ST.JC.18120972
Level 1
Adam saves $8.70.
He saves 3 times as much as Bryan.
How much does Adam save more than Bryan?
2 m
D Multiplication D Division More than or less than Model Times-as-many Units method
473 P6.ST.JC.18121406
Level 2
Fill in the blanks.
Adam has some stickers.
Bryan gives him more stickers.
The number of stickers that Adam has increases by 25%.

  1. Number of stickers that Adam has at first = _____ u
  2. Number of stickers that Bryan gives him = _____ u
  3. Number of stickers that Adam has in the end = _____ u
3 m
Percent change by Percent to units Units method
474 P5.ST.JC.18121206
Level 3
The average cost of some books is $30.
If 3 of the books are now each $15 more and
2 of the books are now each $5 less,
the average cost of the books becomes $32.
How many books are there altogether?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
475 P3.ST.JC.18120925
Level 3
Adam gets 3 stickers for every 8 books that he reads.
If he reads 20 books,
how many stickers does he get?
4 m
W Remainder Proportion
476 P4.ST.JC.18120973
Level 2
Adam pays $2.40 for a sticker and a marble.
The sticker costs 3 times as much as the marble.
  1. What is the cost of 1 sticker?
  2. How much is the cost of 4 marbles and 2 stickers?
4 m
D 4 operations Model Times-as-many Model Stacking Units method
477 P6.ST.JC.18121407
Level 3
Fill in the blanks.
Adam and Bryan share some stickers.
When Adam gives 10 to Bryan, Bryan's share increases by 20%.

  1. Number of stickers that Bryan increases by in percentage = _____%
  2. Number of stickers that Bryan has in the end in percentage = _____ %
  3. _____% of Bryan's stickers is the same as 10.
  4. Number of stickers that Bryan has at first = _____
4 m
Percent change by Units method
478 P5.ST.JC.18121207
Level 3
The average cost of some books is $10.
After 2 new books are added,
it adds another $60 to the total cost.
As a result, the average cost of all the books increases to $20.
How many books are there at first?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
479 P3.ST.JC.18120926
Level 3
Adam gets 3 stickers for every 8 books that he reads.
If he reads 80 books,
how many stickers does he get?
4 m
W Multiplication & division Proportion
480 P4.ST.JC.18120974
Level 1
Adam saves $2.50.
Bryan saves 3 times as much money as Adam.
Chris saves $1.90 less than Bryan.
How much money does Chris save?
3 m
D 4 operations Model Comparison Model Times-as-many Units method

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