Since it is easily calculated using a calculator, I assume you need this done in the head.
Yes, you can do that.
It takes a few words to explain this, but if you understand how this is done, it goes fast.
27=3*9
so 7263*27 = (7263 * 3) * 9
so first multiply 7263 by 3.
72*3=216, 63*3=189
so 3*7263=21789
So far so good.
Now you can multiply anything by nine by subtracting from the right neighbour, starting from the right.
For example, 27*9. the right neighbour of 7 is 0, borrow 1, so 10-7=3
the right neighbour of 2 is 7, but we borrowed 1, so 6. 6-2=4
At the beginning of the number 27, we add a zero which we subtract from the right neighbour 2 to get 2.
So 27*9=243.
Now for 21789, we have successively
(10)-9=1
8-8=0 (9 was borrowed to become 8)
8-7=1
7-1=6
(11)-2=9
and finally
1 -0 = 1 (2 was borrowed to become 1)
So the final answer is 196101
Answer:
there is a good and bad effect on the world, the positive reason being economically. smoking is a great money maker it was worth US$88 billion dollars in 2018. the negative reason is the pollution and what it does to the human body such as cancer
Explanation:
They both are formed through the attraction of atoms possessing opposite polarities. Hydrogen bonds is a relatively weak bond between two oppositely charged sides of two or more molecules and in an ionic bond, an atom gives away one or more electrons to another atom, which means the ionic bond is stronger.
Answer:
There are many shreds of evidence that support the theory of plate tectonics and make it such a firmly believed idea. These pieces of evidence include fossils, glaciers, earthquakes and volcanic activity, the shape of continents, the magnetism of rocks on the seafloor, the mid-ocean ridge system, and others.
Fossils give an idea of the location of the plants and animals that once existed. Earthquakes and volcanic activity also help in determining the cause of the boundaries and rifts formed. The shape of the continents seems to be fit with one other that gives the idea that these were together and moved away from each other.
