I Think I Know.

Yee Haw!

Yippy Skippy!

Potpourri

I got You Babe!

100

The Grade Level Math Standard: Know from memory all products of two one-digit numbers.

What is the 4th Grade?

100

Add by Place Value

24 + 28 =

ADD BY PLACE VALUE The tens are added together and the ones are added together. Then the tens and ones are added together to find the total sum (answer).

24 + 28 =

Add Tens: 20 + 20 = 40

Add Ones: 4 + 8 = 12

Add Tens & Ones: 40 + 12 = 52

Add Tens Add Ones 20 + 4 20 + 8

Add Tens & Ones: 40 + 12 = 52

100

ADD ONE NUMBER ON OR IN PARTS

24 + 28 =

Add One Number On Using Place Value

28 + 20 = 48

48 + 4 = 52

28 48 52

100

Estimate to the nearest 10 to solve.

76+25=

80+30=110

100

What does a plant grow in math class?

What is a ...square root?

200

Two math books complain to each other. What do they tell each other?

I have so many problems.

200

Solve by decomposing.

61+19=

60+1 +10+9

60+10=70

1+9=10

70+10=80

200

Use a double to solve this problem.

8+7=

How would you use a double to solve this problem?

8+7=

8+8=16

16-1=15

or

7+7=14

14+1=15

200

In which grade level do we focus on the combinations of 5.

kindergarten

200

BREAK APART BY PLACE VALUE

1,234 x 9 =

Equations

Multiply Thousands: 1,000 x 9 = 9,000

Multiply Hundreds: 200 x 9 = 1,800

Multiply Tens: 30 x 9 = 270

Multiply Ones: 4 x 9 = 36

Add Products: 9,000 + 1,800 + 270 + 36 = 11,106

OR AREA MODEL

300

COMPENSATION

39 x 25 =

39 x 25 = (40 x 25) - (1 x 25)

39 x 25 = 1,000 - 25

39 x 25 = 975

300

BUILDING UP GROUPS BY MULTIPLYING

2,512 ÷ 4 =

4 x = 2,512

4 x 500 = 2,000

4 x 100 = 400

4 x 25 = 100

4 x 3 = 12

500 + 100 + 25 + 3 = 628 4 x 628 = 2,512

300

BREAK APART BY ADDITION

39 x 25 =

39 x 25 = (39 x 10) + (39 x 10) + (39 x 5)

39 x 10 = 390 39 x 10 = 390 39 x 5 = 195

975

300

Adding Up To subtracting in Parts

925 - 674 =

*925 - 600 = 325*

*325 - 20 = 305*

*305 - 50 = 255*

*255 - 4 = 251*

674 + ___ = 925

674 + 1 = 675

675 + 200 = 875

875 + 50 = 925

1 + 200 + 50 = 251

300

Mr. Skip had 400 dirty rags. He cleaned 379 of them. How many dirty rags are left?

What is...21

400

The middle name of Brad.

Bobbi

400

Use expanded form to solve.

355+422=

What is

300 +50+5

400+20+2

300+400=700

50+20=70

5+2=7

777

500

This is the grade level which contains the standard algorithm for addition and subtraction.

What is 4th Grade?

500

True or False. Do students need to memorize division facts?

What is false?

They need to be able to relate them to multiplication.