Addition and subtraction Fun with Numbers Introduction to

Addition and subtraction Fun with Numbers!

Introduction to Addition › Addition is adding two numbers together to make a higher number (e. g. 2+4=6) › One whole number plus another whole number equals a new whole number › Fractions can be added together as well (e. g. ½+1/2=1)

Steps of Addition › Write a problem horizontally _+_ › Write a problem vertically _ +_ › The answer is called a sum (e. g. the sum of 5+5 is 10) Write the first number in a problem Count the second number with the first The total, or sum, is the number made from both numbers

Examples and tutorials Copyright: Elearnin 2013 0+1=1 2+3=5 4+5=9 1+2=3 3+4=7 5+6=11 0+2=2 3+3=6 5+5=10 6+6=12 2+2=4 4+4=8 Use the video and example list to help with the problems on the next slide

Now it's your turn! › Solve the problems below and correct your answers with the audio 1+1= 2+1= 3+1= 1+2= 2+2= 3+2= 1+3= 2+3= 3+3= 1+4= 2+4= 3+4= 1+5= 2+5= 3+5= 1+6= 2+6= 3+6=

Introduction to Subtraction › The opposite of addition › Subtraction is taking away a certain amount from a larger amount (e. g. 10 -5=5) › fractions can also be subtracted from each other (e. g. 1 -1/2=1/2)

Steps to Subtraction › to subtract one number from another the larger number must be placed first (e. g. 12 -6=6) › Sometimes “Borrowing” needs to be used (add a one to the right-hand column and take one away from the left-hand column) › Can be written both horizontally and vertically, like addition Write larger number Subtract smaller number by counting backwards The total, or difference, is the number left over after subtracting

Examples and tutorials 1 -0=1 3 -2=1 5 -4=1 0 -0=0 2 -2=0 4 -4=0 2 -1=1 4 -3=1 6 -5=1 1 -1=0 3 -3=0 5 -5=0 Copyright: Budha. Guru 2012 Use the video and examples provided to help you with the problems on the next slide

Now it’s Your Turn! › Solve the following problems and check your answers with the audio 1 -1= 12 -6= 13 -1= 2 -1= 9 -2= 16 -3= 3 -1= 13 -5= 18 -4= 3 -0= 10 -1= 20 -5= 5 -1= 20 -10= 32 -16= 8 -3= 11 -0= 19 -2=