Maths Mate Term 4 Sheet 6 Question 24

Question: Fill in the missing digits in the multiplication.

2 _ 6

X   3

_______

_ 3 _

How I solved it:

 

Firstly I worked out what three times six was. The product is 18 so I put down the eight and carry the one over to the next column. Next I figure out what three times something plus one equals that ends in 3. To do this I go through my three times tables until I reach three times four, which is twelve, and then add one which is thirteen. I put the 4 in the middle of the 2 and 6 and carry the 1 over to the next column. Then, 3 times 2 equals 6, plus I add the 1 that was carried over and the product is 7. I put the 7 down in the answer.

Maths Mate Term 4 Sheet 5 Question 24

Fill in the missing digits, using the digits one to nine.

1  _  9

x      6

________

_   5   _

Answer:

 First I worked out that 6 times 9 is 54, so I put the 4 down in the unit column and carried the 5 to the next column.

Then I had to figure out 6 x ? plus the 5 carried over and the answer needed to end in 5. So I figured out that 6 x 5 is 30 and if I then add the carried 5 the answer is 35. The 5 is already in the answer so I just have to carry the 3 over to the next column.

Then I figured out that 6 x 1 plus the carried over 3 equals 9.

Therefore the solution to the problem looks like this :

355  9

x        6

________

9   5  4

 

 

9   5  4

Maths Mat Term 3 Sheet 8 – Question 22

 

 

Fill in the missing digits.

 

 

2        7

?        ?

+       3       6

________________

9       5

 

 

 

I start on the left hand column as usual for addition. The numbers given, 7 and 6 add up to thirteen, but I know that the answer to this column must end in five as given. Therefore the missing number in the left hand column must be 2 so that the column adds up to 15. The 5 is given and I carry the 1.

I know that the right hand column must add up to 9 because it is given. The other given numbers are 1 and 3. These add up to 4, plus the 1 that I carried over equals 5. Therefore, because the total of this column needs to be 9, then the missing number is 4

.

2       7

4      2

+       3       6

________________

9       5

Maths Mate Term 3 Sheet 7 – Question 22

Fill in the missing digits in the subtraction.

?  9

_  5  ?

              

2  3

 

Firstly I work out the equation 9 minus 3, this will leave me with our first mystery number. This number is 6. I then had to work out what number, minus 5 equals 2. The second mystery number is 7.

This is the resulting equation.

7  9

_  5  6

              

2  3

Maths Mate Term 2 Sheet 6 – Question 23

I think of a number, add 15 and then divide it by 4. If the result is 5, what was the original number?

To solve this question I worked backwards.

I firstly multiply 5 by 4 to get an answer of 20.

Then I subtract 15 off 20 to get 5.

I then double checked my working out. –

5 times 4 equals 20, so 20 divided by 4 must equal 5.

Therefore 5 is the original number.