Place Value
50x2
100
245+132
377
Draw or describe an equal groups model for 3×4 3×4 and give the product.
3 groups of 4: product 12
What does the commutative property of addition say? Give an example with numbers under 20.
Commutative property: order can change, e.g., 3+5=5+3 3+5=5+3
Anna has 45 45 stickers. She gives 12 12 to a friend. How many does she have left?
45−12=33 stickers
40x3
120
Solve:
600-279
321
If one pack has 5 pencils and there are 4 packs, how many pencils total? Write as a multiplication sentence and compute.
5×4=20 pencils
Use the associative property to simplify: (2+5)+8= (2+5)+8= by regrouping.
(2+5)+8=2+(5+8)=2+13=15 (associative regrouping)
Jay ran 3 3 laps. Each lap is 120 120 meters. How many meters did he run in total? (Write a number sentence and answer.)
3×120=360 meters
Harper has a bookcase in her room. It has 4 shelves, and there are 20 books on each shelf. How many books does Harper have?
80
Solve:
378+447
825
Use skip counting to find 6×5 6×5 and show the sequence you used
Skip counting: 5, 10, 15, 20, 25, 30 -> 6×5=30 6×5=30
Show how you can use the distributive idea (breaking a number into tens and ones) to compute 4×13 4×13 (explain in words or with a short number sentence).
4×13=4×(10+3)=4×10+4×3=40+12=52
A bakery packs muffins into boxes of 6. If they have 54 54 muffins, how many full boxes can they make? How many muffins are left over?
54÷6=9
Diego made a scrapbook. There are 30 pages in the scrapbook, and he put 3 pictures on each page. How many pictures did Diego put in his scrapbook?
90
1,000-436
564
A teacher makes 8 rows with 6 chairs in each row. How many chairs are there? Write the multiplication sentence and solve.
8×6=48 chairs
Which property explains why 7+0=7 7+0=7? Give the property name and a short explanation
Identity property of addition (adding zero keeps the number the same).
Mia arranged 4 4 rows of tables with 7 7 tables in each row. Then she added 6 6 more tables. How many tables are there now? (Write an equation and solve.)
4×7=28 then 28+6=34 28+6=34 tables
210
Solve:
824+179
1,003
Explain what the multiplication fact 4×12 4×12 means using arrays and then find the product.
4×12=48 (array 4 rows of 12 or 12 rows of 4)
Use properties to show that 9+6+1=9+(6+1) 9+6+1=9+(6+1) and compute the total.
Left and right show equality: 9+6+1=9+(6+1)=9+7=16 9+6+1=9+(6+1)=9+7=16
A library has 1,200 1,200 books. They sort them into 4 equal sections. Then they add 85 85 new books to one section. How many books are in that one section now?
1,200÷4=300; 300+85=385