Question

Which choice is the same as 19 tens?

Answer 1

Answer

1 hundred and 9 tens

Explanation

19 tens is the same as ten times 19, so:

19 tens = 10 x 19

Remember that to multiply any number by 10 or 100 we just need to attach the zeros to the number, so:

10 x 19 = 190

Now let's check which one of our given choices is equivalent to 190:

10 hundreds and 9 tens

10 hundreds is ten times a hundred, so: 10 x 100 = 1000

9 tens is 9 times ten, so: 9 x 10 = 90

Now we just need to add them both:

10 hundreds and 9 tens = 1000 + 90 = 1090

1090 is not equal to 190, so this choice is wrong.

1 hundred and 9 tens

1 hundred is one time one hundred so: 1 x 100 = 100

9 tens is 9 times ten, so: 9 x 10 = 90

Now we just need to add them both:

1 hundred and 9 tens = 100 + 90 = 190

This is our guy!

We can conclude that 19 tens is 1 hundred and 9 tens

9 hundreds and 1 ten

9 hundreds is 9 times one hundred, so: 9 x 100 = 900

1 then is 1 time then, so: 1 x 10 = 10

9 hundreds and 1 ten = 900 + 10 = 910

Wrong choice.

1 hundred and 9 ones

1 hundred is 100

9 ones is 9

1 hundred and 9 ones = 100 + 9 = 109

Wrong choice.

Answer 2

1 hundred and 9 tens. 19 tens is 190.