Bridges unit 6, grade 4

10 x 34

• 340

• 34

• 3400

• 3400

Ari says, "You can solve 34 x 20 by first solving 34 x 2!"

• True

• False

34 x 20 =

• 640

• 340

• 680

• 860

Grace says she can solve 5 x 34 by using the "half 10s strategy" where she solves 34 x 10 first and then divides it in half. Would this strategy work?

• False

• True

Now you try the "half 10s strategy" for this problem:

5 x 42 =

• 510

• 420

• 320

• 210

Charlie says she can solve 25 x 99 by first solving 25 x 100 and then subtracting 1 x 25. Do you agree or disagree?

• agree

• disagree

Which multiplication equation or equations might best help you solve 65 x 99?

• 60 x 8

• 65 x 100 and 1 x 65

• 60 x 5 and 90 x 5

• 5 x 4 and 60 x 90

Jude says to solve 9 x 17, you can solve 10 x 17 and 170-17. Do you agree or disagree?

• agree

• disagree

Max brought water for his after school class. There are 15 students and he brought 24 ounces of water for each student.

Which equation bests represents this word problem?

• 24 / 15 = w

• 15 + 24 = w

• 15 x 24 = w

• 24 - 15 = w

Miss Murdock has 180 students. She wants to organize her students into teams of 9 for a game.

Which equation best represents this word problem?

• 180 x 9 = t

• 180 / 9 = t

• 180 + 9 = t

• 180 - 9 = t