Lesson 5-1 to 5-2
Numbers that are easy to add, subtract, multiply, or divide mentally.
What is compatible numbers?
Number that is being divided.
What is dividend?
An arrangement of objects, pictures, or numbers in rows and columns.
What is array?
The amount left over after dividing one number by another.
What is remainder?
A visual representation or drawing used in math to help solve problems.
What is a bar diagram?
Estimation of 48 divided by 5.
What is about 10?
5 × 10 = 50
Estimation of 1,320 divided by 6.
What is about 200?
1,200 ÷ 6 = 200
96 divided by 6.
What is 16?
8,772 divided by 9.
What is 974 R6?
Estimation of 232 divided by 9.
What is about 30?
270 ÷ 9 = 30
Estimation of 2,438 divided by 5.
What is about 500?
2,500 ÷ 5 = 500
Lucy had all 78 of her paintings covering 3 walls. If each wall had an equal number of paintings, how many paintings did each wall have?
Each wall had 26 paintings.
How many 6s are in 488?
There are 80 6s in 488.
Carter has drawn 223 illustrations of tanks over the past 5 days. How many does he draw per day?
44 illustrations with 3 left over.
Complete this statement using > or < to fill in the circle.
930 ÷ 4 ◯ 762 ÷ 4
930 ÷ 4 > 762 ÷ 4
The divisor is the same in each expression, and 930 is greater than 762.
Statements that have the correct estimated quotients:
A. 5,814 ÷ 7 is about 700.
B. 2,010 ÷ 4 is about 500.
C. 889 ÷ 3 is about 300.
D. 4,809 ÷ 6 is about 80.
E. 2,417 ÷ 8 is about 300.
What is B, C, and E?
Maya is making random cookie goodie bags with 4 cookies in each bag. She has four flavors. She has 46 milk chocolate, 42 white chocolate, 35 raisins, and 21 oatmeal cookies. How many students will get a goodie bag?
Maya has 144 cookies in total. 36 students will get a goodie bag.
Ms. B wants to create same-size shape decorations for the class using straws. She has 2,000 straws. The shapes she wants to make are pentagons, hexagons, squares, and octagons. What hidden questions must be answered first before she starts?
How many sides does each shape have?
Kellan wants to divide 133 pieces of candy equally into 7 boxes. He decides to put 19 pieces in each box. Use estimation to determine if 19 pieces in each box is reasonable.
Round 133 to 140. 140 ÷ 7 = 20. So 133 ÷ 7 is about 20, which is close to 19. Kellan putting 19 pieces in each box is reasonable.
About 60 tables. Round 536 to 540. 9 × 60 = 540, and 540 is close to 536.
Charles has 472 tickets. He wants to use an equal amount of tickets for the next 5 monthly shops. Assuming Charles takes a 5-month vacation and gets no more tickets, will Charles be able to use the same amount of tickets?
No. Charles can use 94 tickets for the next 5 monthly shops and have 2 left over.
Mrs. Q grades 76 papers on Wednesday and 113 papers on Thursday, for a total of 9 hours.
How many papers does she grade per hour?
21 papers.