Simplify 2a - 5 + 3a + 4
2 answers:
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Answer:
Because we actually divide by 10 when a number is multiplied by 0.1.
Step-by-step explanation:
Let be a number.
When we multiply a number by 10:
(One '0' is increased in the number)
For example:
Considering a decimal number:
Multiplying a number with 0.1 (which is actually ) means dividing the number by 10.
Considering a decimal number:
<em>Therefore, When multiplying a number by 0.1, move the decimal to the left.</em>