Question
1
visibility
Determine the number that makes the equation true.
4 + 5 = 10 –
-
A
2
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B
8
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C
0
-
D
1
The correct answer is 1.
Solution:
Consider the given equation.
4 + 5 = 10 –
To determine the missing number, we need to find: 4 + 5.
Which gives:
4 + 5 = 9
So,
4 + 5 = 10 –
9 = 10 –
Next, we look for the number which when subtracted from 10 gives 9.
Note that,
10 - 1 = 9
Then,
4 + 5 = 10 - 1
So, number 1 makes the equation true.