Mental Math
Estimating
Dist. Prop. & Arrays
Partial Products
Standard Algorithm
100

What is the *magic* word that will tell you you need to estimate in a question?

What is about?

100

True or False: Ms. Farkas has gone skydiving in Hawaii.

What is true?

100

The first step of distributive property is to break the number up into its __________ form.

What is expanded?

100

What was Ms. Farkas' favorite sport to play when she was younger?

What is softball?

100

There are seven 4th grade classrooms that hold 24 students each. Write an equation that represents this problem, then solve.

What is 7 x 24 = x ? and What is 168 students?

200

What is Ms. Farkas' least favorite type of ice cream?

What is mint chocolate chip?

200

I bought an 6-roll package of toilet paper. Each roll has 98 papers.
Which is the best estimate for the total number of toilet papers I bought?

What is 600 toilet papers?

200

How could you use distributive property (breaking apart) to find 4 x 387? Write the equation. 

What is (4 x 300) + (4 x 80) + (4 x 7)?

200

A hotel has 6 floors. If there are 115 room on each floor, how many total rooms are there in the hotel?  Solve using partial products.

What is 690 floors?

200

What is Ms. Farkas' favorite color?

What is maroon?

300

What is Ms. Farkas' favorite food?

What is... everything... BUT... tacos?

300

Ms. Farkas ate 1,280 tacos in one week. About how many tacos did she eat in 8 weeks?

What is about 8,000 tacos?
300

Draw an array that represents the equation 246 x 3.

What is 6 hundreds, 12 tens, 18 ones in total?

300

What are the partial products for 8 x 618?

What is 64 + 80 + 4,800?

300

The 4th grade teachers spend $2,542 a year for textbooks. How much do the teachers spend in 5 years?

What is $12,710?

400

Mrs. Graziano bakes brownies in batches of 10 and batches of 50. If she bakes 6 batches of 50 brownies,
how many brownies does she bake?

What is 300 brownies?

400

Ms. Quinby ate 5,089 bowls of mac and cheese in one year. How many did she eat in 4 years? Explain, in words, how you can check to see if your answer is reasonable.

In one year, she ate about 5,000 bowls of mac and cheese. So in 4 years, she ate about 20,000 bowls. 20,356 is close to 20,000, so my answer is reasonable.

400

What are two of Ms. Farkas' favorite things to learn about that she thinks are SO cool?

What is either dreams, the brain, or evolution?

400

What state did Ms. Farkas go to college in?

Hint: it was one of the New England Colonies!

What is Connecticut?

400

What is Ms. Farkas' favorite Halloween movie OR favorite Halloween song?

What is Halloweentown?

OR

What is The Monster Mash?

500

A bakery has 3 different kinds of muffins. The following numbers are the amount of muffins that can fit in one box to sell.

Chocolate Chip = 100, Blueberry = 200, Apple = 300

Answer the following questions:

4 boxes of Blueberry = __________ muffins

2 boxes of ________ = 600 muffins

7 boxes of Chocolate Chip = _______ muffins

4 boxes of Blueberry = 800 muffins

2 boxes of Apple = 600 muffins

7 boxes of Chocolate Chip = 700 muffins

500
True or False: Ms. Farkas has broken a bone before. 


Extra Credit: What bone was it?

What is true? What is her finger?

500

Draw an array that represents the problem 3 x 1,321. What are the partial products?

3 thousands, 9 hundreds, 6 tens, 3 ones.

3,000 + 900 + 60 + 3

500

True or False: Ms. Farkas was blind in her left eye when she was younger

What is true?

500
What is 8,967,492 x 6?

What is 53,804,952?