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Anettt [7]
2 years ago
12

How does 10 - 4 help you solve 30 - 4

Mathematics
2 answers:
NikAS [45]2 years ago
7 0
It helps because if you know 10-4=6 then you know that 30-4 would be 26. Since 30 is only 20 more than 10 you know that 20+6 would be the answer.
kirza4 [7]2 years ago
4 0

Answer:

The value of given expression is 26.

Step-by-step explanation:

We need to solve 30 - 4 using 10 - 4.

First of all solve 10 - 4.

10-4=6                     .... (1)

Consider the given expression

30 - 4

Split the number 30 as the sum 10 and a number.

(20 + 10) - 4

It can be written as

(20 + 10) + (-4)

Using associative property of addition.

20 + (10 + (-4))

20 + (10 - 4)

Using equation (1) we get

20 + 6

26

Therefore the value of given expression is 26.

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