Multiplication
6X24=
144
36 ÷ 6=
6
Lisa has 56 pieces of candy for her classroom party. Only 4 students came to the classroom party. How many pieces of candy will each friend receive?
If any place values is 10 or greater, regrouping will be needed.
Explain why using place value strategy for problems such as 63 divided by 7 may not be the best strategy.
You cannot make a group of 7 from 6 tens. They need to be regrouped into the ones place. If students are not careful they can easily misgroup and get the incorrect answer.
7X345=
2,415
452÷ 5=
90 r4
A school orders 678 crayons to put into kits. Each kit needs 6 crayons. How many full kits can they make, and how many crayons are left over?
Describe a Real-world situation where long division will be needed instead of mental math.
When the numbers are too big for mental math.
What are the 4 division strategies?
-Long Division(standard algorithm)
- Place Value
-Big 7
-Box Method
9X157=
1,143
714÷ 7=
102
There are 176 students in the 4th grade level each student gets 7 notebooks for assignments. How many notebooks does the grade level have in all?
The 4th grade class has 1,232 notebooks in all.
How can you check if your division answer is correct?
You can use multiplication to check if your answer is correct
A student worked out the problem 34x6=180. What did the student do that was incorrect. What is the correct answer?
They multiplied 3 tens by 6 which gives you 18 tens. They forgot to multiple 4x6=24. 180+24=204
3x451=
1,353
6,842÷ 2=
3,421
A fundraiser bakes 645 cookies and packs them into boxes holding 8 cookies each. How many full boxes can they fill?
They can fill 80 boxes of cookies with 5 remainding cookies.
What does remainder 7 mean in real life?
After you make as many groups as possible. 7 items are left over that did not fit or complete a group.
A student solved 243 divided by 5. check their work. The student got 318 R3 as their final answer.
_3_18__
5|243
-15__
93
- 90__
R3
They divided 24 by 5 incorrectly. student wrote 3 instead of 4 which made the whole quotient wrong. The correct answer is 48 R 3
6X1,643=
9,858
4,861÷ 6
810 r1
A fundraiser raises 3,945 dollars and there are 6 employees. Assume each employee raised the same amount. How many dollars did each employee raise?
Each employee raised 657 dollar with 3 dollars remainding.
Create ae multiplication and division equation with the same number but different meanings.
Example: Multiplication 24x3=72. (3 groups of 24 makes 72).
Division: 72 divided by 3=24 (72 items split into 3 groups, each group gets 24)
456
x __7__
42
35
+280__
357
What mistake did they make?
They multiplied 5x7= correctly but forgot the 5 is not 5 ones. It's 5 tens x7=35 tens (350). Same with 4x7. it is 4 hundreds x 7=28 hundreds (2800). correct answer is 3,192.