I Think I Know.
The Grade Level Math Standard: Know from memory all products of two one-digit numbers.
What is the 4th Grade?
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
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
Estimate to the nearest 10 to solve.
76+25=
80+30=110
What does a plant grow in math class?
What is a ...square root?
Two math books complain to each other. What do they tell each other?
I have so many problems.
Solve by decomposing.
61+19=
60+1 +10+9
60+10=70
1+9=10
70+10=80
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
In which grade level do we focus on the combinations of 5.
kindergarten
Solve by using the BREAK APART BY PLACE VALUE STRATEGY.
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
Solve using COMPENSATION.
39 x 25 =
39 x 25 = (40 x 25) - (1 x 25)
39 x 25 = 1,000 - 25
39 x 25 = 975
Solve using the STRATEGY 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
Solve by using the BREAK APART BY ADDITION STRATEGY.
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
Solve using the strategy Adding Up To or 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
Mr. Skip had 400 dirty rags. He cleaned 379 of them. How many dirty rags are left?
What is...21
This is why Brad hasn't talked to his wife in a week.
What is: he didn't want to interrupt her?
This causes skin to dry.
What is a towel?
This grade level contains the standard for mastery of combinations to 20.
What is 2nd Grade.
This is the most condescending bear.
What is a PAN - DUH!
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
This is the grade level which contains the standard algorithm for addition and subtraction.
What is 4th Grade?
This is what you call cheese that belongs to someone else.
What is: Nacho Cheese?
You are an American when you enter and exit the bathroom and this is what you are while in the bathroom.
What is European!
This is the reason the toilet paper didn't cross the road.
What is: it was stuck in a crack?
True or False. Do students need to memorize division facts?
They need to be able to relate them to multiplication.