An equation is like a set of balanced scales. Both sides are equal. Look at the scale on the right.
On one side are 4 black triangles and 3 grey triangles.
On the other side, we have a problem 4 + 3.
Is this a balanced equation?
Yes, because they both represent 7.
Make these scales balance by adding the missing value.
Problem 1 :
Solution :
On one side, we have a problem 5 + ?
On other side there are 5 black circles and 4 grey circles.
Number of balls in the right side is, 5 + 4 = 9.
5 + 4 = 9
It is a balanced equation.
Problem 2 :
Solution :
On one side, there are 5 black diamonds and 3 grey diamonds.
On the other side, we have a problem 5 +?.
5 + 3 = 8
It is a balanced equation.
These scales have number problems on each side. One side has a complete problem. On the other side, you need to work out the missing value. Write the value on the box so that the scales balance:
Problem 3 :
Solution :
On one side, we have a problem 5 ×?.
Let us think 5 should be multiply by what number in order to get 30.
5 × 6 = 30
On the other side is problem 19 + 11 = 30
It is a balanced equation.
Problem 4 :
Solution :
On one side, we have a problem 18 + ?.
18 should be added by what number in order to get 36.
18 + 18 = 36
On the other side, we have 50 - 14 = 36. So, It is a balanced equation.
Problem 5 :
Solution:
On one side, we have 5 × 9 = 45
On the other side is problem ? + 15.
15 should be added by what number in order to get 45.
30 + 15 = 45
It is a balanced equation.
Problem 6 :
Solution :
On one side, we have ? - 5.
So, we have to think 5 should be subtracted from what number in order to get 5.
10 - 5 = 5
On the other side, the problem is 35 ÷ 7 = 5
It is a balanced equation.
Problem 7 :
Solution :
On one side, we have 9 ×?.
9 should be multiplied by what number in order to get 81.
9 × 9 = 81
On the other side is problem 100 - 19 = 81
It is a balanced equation.
Problem 8 :
Solution :
On one side, we have 33 ÷ 3 = 11
On the other side, the problem is 22 - ?.
22 should be subtracted from what number in order to get 11.
22 - 11 = 11
It is a balanced equation.
May 21, 24 08:51 PM
May 21, 24 08:51 AM
May 20, 24 10:45 PM