Number Sentences

Number sentences and story problems

LI: To write a number sentence/number story to show we understand the question

A number sentence uses numbers and symbols instead of words.  Number sentences are often used if there is problem to work out.  An example of writing a number sentence from a story problem is shown in the box below.

Example: Three friends have 59 marbles.  If Tamatea has 12 and Sarah has 28, how many does Bob have? (story problem) Write a number sentence to show how many marbles Bob has. 59 – 12 – 28 = 19    (number sentence) Five friends have 6 marbles each.  How many do they have altogether? (story problem) Write a number sentence to show how many marbles they all have.    5 × 6 = 30   (number sentence)

Sione was working out how much money he had.  He started with $482 in the bank, spent $152 on an MP3 player, $50 on DVDs, and $25 on food. Write a number sentence to show how much money Sione has left.

$482 - 152 - 50 - 25 = 255

482-152 = 330

330-50 = 280

280-25 = 255

Max has been working out how many runs in total he has got for his team.  So far he has scored 18, 24, 60, 103, and 25 runs.  Write a number sentence to show how many runs he has scored so far.

18 + 24 = 42

42 + 60 = 102

102 + 103 = 205

205 + 25 = 230

Awhina had 640 marbles.  She decided to give them away to her family.  She gave 90 to her younger sister, 80 to her brother, 30 to her mother and 50 to her father. Write a number sentence to show how many marbles Awhina had left.

640 - 90 = 550

550 - 80 =

Mere went shopping for Easter eggs.  She bought 7 packets of 5 eggs. Write a number sentence to show how many Easter eggs Mere bought altogether.

Maraea was training for a swimming race.  For the first 3 days she swam for 2 hours a day. For the next 3 days she swam for 5 hours a day. Write a number sentence to show how many hours she swam over the 6 days.

Hamish gave away all his old Dragonball Z cards.  He had 28 cards and shared them equally between his 7 friends. Write a number sentence to show how many cards they get each.

Write a story problem for the number sentence: 70 + 15 + 25 = _____

Teagan has $70, his Grandma gives him $15 and his Uncle gives him $25.  How much money does he have?

       

       

Write a story problem for the number sentence: 365 – 160 – 50 – 123 = ____

Michael had $360, he spent 160 on a ps3, 50 on chocolate and 123 on a ipod. How much money does he have left?

Write a story problem for the number sentence: 3 × 5 = ____

Jacob has 3 mates.  He gives 5 chocolate bars to each of them.  How much chocolate bars did Jacob have?

Write a story problem for the number sentence: 24 ÷ 4 = ___

Suliasi has 24 lollies.  He gives 4 to each of his friends.  How much did his friends get?