Serious Subtraction 2

Serious Subtraction 2

We are learning to solve subtraction problems using whole and decimal numbers.

Times Table Practice:

3x3 = 9   5x5 = 25 8x7 = 56    12x10 = 120 4x6 = 24 5x7 = 35   2x4 = 8 3x8 = 24 9x8 = 72 4x7 = 28   9x7 = 63

Show your working for the following problems, either on here or in your books

Your sister gives you $125 to spend on lollies. If you spend $65 how much money would you have left over?

125-65=60

125-25=100-40=60

Zaeeda has bought her sister  a new puppy. She has $500 in her bank account as she heads to the shops. 

She first buys a dog bed for $60. How much money does she have left?

500-60=440

100-60=40+400=440

She then buys a bowl for $25. How much does she have left?

440-25=415

40-25=15+400=415

Then she buys 3 chew toys. Each toy costs $3.50. How much does she have left?

3x3.50=10.5

3x3=9

3x0.5(0)=1.5+9=10.5

10.5-415=

415-10=405

5-0.5=4.5+400=404.5

Finally she buys a diamond collar for the dog which costs $154.50. How much is left in her account at the end of the day?

404.5-154.50=250

404-104=300-50=250+0.5=250-0.5=250

Kalani’s python has become ill and needs to go to the vets. He  has $100 in his wallet.

The cost of the vet visit is $65.50. How much money is left in Kalani’s wallet?

100-65.50=34.5

100-60=40-5=35-0.5=34.5

AJ is also at the vet with his rabbit. His rabbit has had expensive surgery. If AJ has 10.25 left in his bank account and he started with $525.80, how much did the surgery cost?

525.80-515.55=10.25

525-515=10

0.80-0.50=0.30-0.05=0.25

0.5+0.05=0.55+515=515.55

Zyla’s puppy is growing every month. He used to weigh 5.67 kg but he now weighs 6.34kg. How much weight has he put on?

5.67+0.67=6.34

5.67+0.03=5.7+0.3=6+0.34=6.34

0.03+0.3=0.33+0.34=0.67