Question

Missing number 20+(-11)=___ +20

Answer 1

Step-by-step explanation:

20+(-11)= (-11) +20

so (-11) is your answer

Answer 2

Given,

The expression: 20+(-11)=___ +20

To find,

The number in the space.

Solution,

We can easily solve this problem by following the given steps.

According to the question,

We have the following expression:

20+(-11)=___ +20

Now, we see that 20 and the sign of addition is there on both sides. So, to find the number to fill the blank, we can use the commutative property of addition.

According to this property, we have:

a+b = b+a

So, in this case, we have a = 20 and b = -11

So, the number in the space will be (-11).

Hence, the missing number in 20+(-11)=___ +20 is (-11).