We are going to begin looking at addition and subtraction next week in Maths. You need to complete at least 5 examples of addition and 5 examples of subtraction in your Learning Logs using whichever written method you feel most comfortable with. You should write each question before showing your workings. Choose numbers to add and subtract that you are comfortable using.

the easiest methd is colum methd so you

1,675,246 – 179,794=0,504,552

0,179,794

0,504,552

Thank you Kayden – check your answer though!

2 add 5 eqwals 7 n7 add7 eqwals 14 100000 add100000 eqwals 200000

Thank you Amy. Could you give me some examples of subtraction too?

55.00+44.00=99.00. 297.00-200.00=97.00

22.00+36.00=58.00. 36.00-22.00=14.00

77.45+30.00=100.45. 77.45-30.00=47.45

99.99+0.30=100.29. 89.99-50.67=39.12

197.00+200.00=397.00 299.999-99.999=200.000

Thank you Aadam. Check 77.45 + 30.00 and 89.99 – 50.67.

Thank you Aadam. Check 77.45 + 30.00 and 89.99 – 50.67. I look forward to seeing your methods this week.

Ive been learning subtraction in my lessons of maths

450+193=643

182+600=782

510+234=744

690+214=940

for the last one make one for me.

Thank you Chelsea. I’ll be interested to see your methods this week. Check the answer to your last calculation. What can you tell me about subtraction too?

I have done this in my book.

adding and subtraction are two different things because adding is commutative and subtracting is not commutative and when you add your number gets larger and when you subtract your number gets smaller for example if you had 456-330 = 236 and for example on adding if you had 180,876+2,000,000= 2,180,876 and here you can see that with subtracting your number gets smaller and when you add your number is larger.

Thank you Rinalds – well remembered details about commutativity. Just double check the answer to your first calculation.

for example adding is like the oppsite of taking away so if you had 10 add 10 and 10 +0 you will know the answer because it is comunitive

You’re right – adding and subtracting are like opposite. We call them inverse operations.

Tell me more about being commutative – give me an example of a number sentence that is commutative.