Question

# Identify the doubles plus 1 fact that can be used to solve 5 + 4 = 9

- 5 + 4 + 1
- 5 + 5 + 1
- 4 + 4 + 1
- 6 + 6 + 1

Hint:

### Double plus 1 , It is used when we have two consecutive number, to make it easy we break one addends and make double with other addend and the plus 1.

## The correct answer is: 4 + 4 + 1

### Here we have to find the double plus 1 to solve the 5 + 4 = 9.

Firstly, we have given equation, 5 + 4 = 9

Lets break addend 5 into 4 + 1

So we can write,

4 + 1 + 4 = 8

Here 4 + 4 is double and the plus 1 , double make the addition easy.

There fore the double plus 1 fact used to solve, 5 + 4 = 9 is 4 + 4 + 1.

The correct answer is 4 + 4 + 1 ( option (c)).

In this question , we have to find the double plus 1 . Double plus 1 is only used in consecutive number like 9 + 8 which solution is 17 but by double plus 1 it will be 8 + 8 = 16 it will be double addition then 16 + 1 = 17 . So it make the addition easy.

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