Middle School Math, Warm-Up #3

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Various Calculations

What is the easiest way to multiply by 10, 100, ...?

1 point

Just append the number of zeros in 10, 100, ... to the number you are multiplying

Add the number you are multiplying to itself 10, 100, ... times.

Clear selection

The decimal number 12.56 is multiplied by 100. Select the statement that is true.

1 point

The decimal point moves 2 zeroes to the left.

The decimal point moves 3 zeroes to the left.

The decimal point moves 2 zeroes to the right.

The decimal point moves 3 zeroes to the right.

The decimal point does not move.

Clear selection

The decimal number 12.56 is divided by 100. Select the statement that is true.

1 point

The decimal point moves 2 zeroes to the left.

The decimal point moves 3 zeroes to the left.

The decimal point moves 2 zeroes to the right.

The decimal point moves 3 zeroes to the right.

The decimal point does not move.

Clear selection

What is the best way to multiply 80x90

1 point

Multiply in a traditional way by lining up the number one underneath the other and perform the operation.

First multiply the numbers 8x9=72 without the zeros, then "multiply the tens as zeroes": 0 x 0 = 00, next put it all together as 7200.

Clear selection

The expression 7.08 ÷ 100 is given. The result of the division is

1 point

708

7.08

70.8

0.708

0.0708

Clear selection

When it comes to Division, what is a Remainder?

1 point

It's a number that has to be remembered.

It is the leftover from a division that could not divide into whole parts only.

It is a leftover that has to be remembered from another division.

Clear selection

The expression 61 ÷ 14 is given. Check all statements that are true.

1 point

14 is the remainder

61 is the remainder

14 is the divisor

61 is the divisor

61 is the divided

the number of times the divisor fits into the dividend precisely is called a quotient

whatever is leftover after the quotient fits precisely into the dividend is called the remainder

the result of the division is called divisibility

61 is the quotient

14 is the quotient

Does the following diagram depict the 61 ÷ 14 division correctly?

1 point

Yes

Clear selection

What is the remainder of this division?

1 point

Which of the following relationships are correct based on the given diagram? Check all that apply.

1 point

14 = 61 ÷ 5 + 4

61 = 14 * 4 + 5

5 * 56 = 61 * 4

14 * 61 - 4 * 5 = 0

What is the quotient and the remainder of the 46 ÷ 11 division?

2 points

quotient

remainder

What is the quotient and the remainder of the 39 ÷ 10 division?

2 points

quotient

remainder

Operations that move the decimal point to the right make the number

1 point

larger

smaller

Clear selection

Operations that move the decimal point to the left make the number

1 point

larger

smaller

Clear selection

Adding 2 trailing zeros to the rightmost position of a decimal number, for example 5.708 has the following effect

1 point

makes the number larger

makes the number smaller

has no effect

Clear selection

Adding 2 trailing zeros to the leftmost position of a decimal number, for example 5.708 has the following effect (check all that apply)

1 point

makes the number larger

makes the number smaller

has no effect

it is avoided by convention, since the only number that usually starts with zero is zero.

Inserting 2 zeros immediately to the right side of the decimal point of 5.708 has the following effect

1 point

makes the number larger

makes the number smaller

has no effect

Inserting 2 zeros immediately to the left side of the decimal point of 5.708 has the following effect

1 point

makes the number larger

makes the number smaller

has no effect

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