Serious Subtraction #1

 WALT: Use our knowledge of place value to solve subtraction problems

Serious Subtraction

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

Times Table Practice:

3 x 3 = 9      5 x 5 =  25      8 x 7 =  56   12 x 10 = 120     4 x 6 = 24  5 x 7 = 35   2 x 4 = 8  3 x 8 =24   9 x 8 =72  4 x 7 = 28 9 x 7 = 63

345 + 385 = 730

300+300=600 

40+80=120

5+5=10

600+120=720

720+10=730

847 + 126 =  973

800+100=900

40+20=60

7+6=13

900+60=960

960+13=973

674 + 586 = 1260

600+500=1100

70+80=150

4+6=10

1100+150=1250

1250+10=1260

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

$65+$60=$125

60+60=120

5+0=5

120+5=125 te answer is 60

She then gives you $234 more. How much money do you have now?

234+60=294

200+0=200

30+60=90

4+0=4

200+90=290, 290+4=294

Pt England school are buying new sports gear. There is $500 in the sports budget. 

They first purchase a basketball hoop for $50. How much money  is left?

$500-$50=$450

They then buy a net for $25.  How much do they have left?

$450-$25=425

450-20=430

0-5=5 , 430-5=425

Then they buy three tennis balls. Each ball costs $3. How much do they have left?

(3x3=9)

$425-9=416

400-0=400

25-9=16

400+16=416

Finally they buy a netball hoop which costs $100.  How much is left in the budget at the end?

$416-100= $316

400-100-300

10-0=10

6-0=6

300+10=310

310+6=$316 there is $316 dollers left in the budget!

Troy has $100 in his wallet. He spends $65.50 on a new PS4 game.
How much money does he have left?

$100-$65.50= 

I don’t know how to fiugure this out?

Kahurangi wins some money and goes on a shopping spree.
If he has 10.80 left in his bank account and he started with $525.80, how much did he spend?

525.80+ 10.80= 536.1

525+10=535

8+8=160

535+1=536.1

Zyla’s puppy is growing every month. He used to weigh 5.6 kg
but he now weighs 6.3. How much weight has he put on?

5.6+6.3= 11.9

5+6=11

6.3=9 

Then add 11 and 9 which would be 11.9 

The answer is 11.9