Number

There are different ways of asking someone to add and subtract numbers. You need to learn the different words

Which of the following mean add and which of the following mean subtract.

SUM     TAKE     MINUS    MORE    INCREASE    PLUS     LESS       DIFFERENCE       TOTAL ALTOGETHER     DECREASE      SUM

Here are some questions that use those words to see if you understand how to use them.

1. A computer game increases in price by Ł5.50 from Ł47.25, what is its new price?

2. The cost of a music CD is Ł12.00. If I have Ł38 pounds to spend.
a. How many can I buy altogether?
b. How much change do I have left?
c. How much more will I need to buy another one?

3. Sam is 1.8 metres tall. Rebecca is 1.3 metres tall. What is the difference in their heights

3.Find the sum of the following 3 numbers:

23, 34, 61

4. Find the difference between the following 2 numbers

121, 22

5. How much more is Ł13.20 than Ł9.50?

6. Find the total cost of the following items. Give your answer in pounds

Item Cost
Crisps 12p
Drink 28p

If I have Ł3 How much change do I have left?

Those look hard because they use those words, but if you know what those words mean, they can become very easy.
Make sure you understand what those words mean!

Now to finish off some quick fire addition and subtraction. Get someone to time you and write down the answers. Good luck!

Go

You need to be able to quickly add and subtract numbers in your head without using pen and paper
Try these and see how fast you can write down the answers.

 1.    3 + 2= 2.    7 + 4 = 3.    11+ 9= 4.    9 + 11= 5.    16 + 7= 6.    13 + 7= 7.    26+ 9= 8.    13 + 6= 9.    9 + 19= 10.   7 + 14=

Now try the subtractions

 1.    11-10= 2.    13-8= 3.    14-7= 4.    12-9= 5.    16-5= 6.    18-3= 7.    19-2= 8.    17-4= 9.    21-2= 10.  14-7=

Here are the answers in columns. How did you do?

 ADD SUBTRACT Total Difference Plus Take away Sum Take Altogether Minus Increase Less more decrease

Remember it is the speed and accuracy that matters.

 1.      3 + 2= 5 2.      7 + 4 = 11 3.    11+ 9= 20 4.      9 + 11=20 5.    16 + 7= 23 6.    13 + 7= 20 7.    26+ 9= 35 8.    13 + 6=19 9.      9 + 19= 28 10.    7 + 14= 21

 1.    11-10=1 2.    13-8=5 3.    14-7=7 4.    12-9=3 5.    16-5=11 6.    18-3=8 7.    19-2=17 8.    17-4=13 9.    21-2=19 10.  14-5=9

Well how did you do? Were you quick? Could you get faster?
Join us again for more help tomorrow

Answers to word questions

1. A computer game increases in price by Ł5.50 from Ł47.25, what is its new price?
ADD THOSE TOGETHER Ł52.75

2. The cost of a music CD is Ł12.00. If I have Ł38 pounds to spend.
d. How many can I buy altogether? 3 (ADD)
e. How much change do I have left? Ł2.00 Ł38 - Ł36
f. How much more will I need to buy another one? Ł10.00 (ADD TO Ł2.00)

2. Sam is 1.8 metres tall. Rebecca is 1.3 metres tall. What is the difference in their heights 0.5m
SUBTRACT 1.3 From 1.8 = 0.5m

3.Find the sum of the following 3 numbers:

23, 34, 61 (ADD) 118

4. Find the difference between the following 2 numbers

121, 22 = 99 (SUBTRACT )

5. How much more is Ł13.20 than Ł9.50? Ł3.70 (SUBTRACT)

6. Find the total cost of the following items. Give your answer in pounds

Item Cost
Crisps 12p
Drink 28p