Bridges 2nd Unit 1 Pretest/Review

Front

How many more beads do you need to make 20?

Back

To find out how many more beads are needed to make 20, subtract the number of beads you have from 20. For example, if you have 6 beads, you need 20 - 6 = 14 more beads.

Front

What is the total number of beads if some are hidden under the shade?

Back

If there are 20 beads in total and some are hidden, you can find out how many are hidden by subtracting the visible beads from 20. For example, if 5 beads are visible, then 20 - 5 = 15 beads are hidden.

Front

Is Rack G's number of beads odd or even?

Back

An odd number is not divisible by 2, while an even number is. If Rack G has 10 beads, it is even. If it has 11 beads, it is odd. You can check by dividing the number by 2.

Front

How many beads are hidden if there are 20 beads in total and 14 are visible?

Back

To find out how many beads are hidden, subtract the visible beads from the total. If 14 beads are visible, then 20 - 14 = 6 beads are hidden.

Front

What is 7 + 8?

Back

7 + 8 = 15.

Front

What is the definition of an even number?

Back

An even number is any integer that can be divided by 2 without leaving a remainder.

Front

What is the definition of an odd number?

Back

An odd number is any integer that cannot be divided by 2 evenly, leaving a remainder of 1.

Front

If you have 10 beads and want to make 20, how many more do you need?

Back

You need 20 - 10 = 10 more beads.

Front

If there are 20 beads and 5 are hidden, how many are visible?

Back

To find the visible beads, subtract the hidden beads from the total: 20 - 5 = 15 visible beads.

Front

What is the sum of 5 and 5?

Back

5 + 5 = 10.