Grams and Kilograms (Word Problems) — Let's Practise!

Grams and Kilograms (Word Problems) — Let's Practise! exercise

• What is the total mass?

  Hints

  What is the unit that is being used in the question? Be sure that this is also the unit in the answer.

  The question says in total, this means that the two amounts must be added.

  Solution

  75 g + 220 g = 295 g

• Pip's luggage.

  Hints

  When Pip is finding the total of more than one item, that means the items need to be added together,

  If Pip is removing an amount, then you need to complete a subtraction equation.

  Solution

  The shorts and the book = 1,035 g or 1.035 kg

  • the shorts weigh (430 g) and the book weighs (605 g)
  • 430 + 605 = 1,035
  • 1,035 g is equivalent to 1.035 kg.

  The shorts and the book plus the hat = 1,250 g

  • the shorts weigh (430 g), the book weighs (605 g), and the hat weighs (215 g)
  • 430 + 605 + 215 = 1,250 g.

  The weight when the book is removed is 645 g

  • 1,250 - 605 = 645 g.

• What do they weigh?

  Hints

  Since there are three ducks and we want to find the weight of one, we must divide the total amount by the number of ducks.

  What is 1,800 ÷ 3?

  Solution

  Each duck weighs 600 g

  • 1,800 ÷ 3 = 600 g

• Cookie recipe.

  Hints

  The original recipe makes 30 cookies. 60 cookies is double this, so you will need to double the ingredients.

  10 cookies is one third of 30. This means that you need to find one third of the ingredients, or divide by 3.

  Solution

  A recipe to bake 30 cookies requires 160 g sugar and 210 g flour. The total mass of the dry ingredients is 370 g.

  • 160 + 210 = 370 g

  To make 60 cookies, the recipe would need 740 g of flour and sugar in total.

  • 370 x 2 = 740 g

  If you want to make fewer cookies, and only need a recipe for 10, then you should use 70 g of flour.

  • 210 ÷ 3 = 70 g

• Baking cakes.

  Hints

  We are finding 7 lots of 10 g, so we need to multiply 7 by 10.

  What is 7 times 10? We can try counting up in our tens to help.

  Solution

  There are 7 cupcakes and each cupcake has 10 g of sugar.

  • 7 x 10 = 70 g
  • We would also get 70 g if we calculated 10 x 7.

• What do the kittens weigh?

  Hints

  Remember that there are 1,000 g in 1 kg, so 2 kg is the same as 2,000 g.

  As we are sharing a total amount between a smaller number, we need to complete a division calculation.

  Count how many kittens there are altogether.

  Solution

  When these kittens were born, they weighed 2.8 kg in total. That means that each kitten weighed 400 g. We know this because we can convert 2.8 kg into 2,800 g, then divide this by the number of kittens, which is 7.