Extend prior knowledge of operations with positive rational numbers to multiply and to divide all rational numbers. a. Understand that the multiplicative inverse of a number is its reciprocal and their product is equal to one. b. Understand sign rules for multiplying rational numbers. c. Understand sign rules for dividing rational numbers and that a quotient of integers (with a non-zero divisor) is a rational number. d. Apply mathematical properties (e.g., commutative, associative, distributive, or the properties of identity and inverse elements) to multiply and divide rational numbers. e. Understand that some rational numbers can be written as integers and all rational numbers can be written as fractions or decimal numbers that terminate or repeat.
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Q 1/6
Score 0
What is the result of multiplying -7 by 9?
30
-2
99
16
-63
Q 2/6
Score 0
What is the result of multiplying -5 by -3?
30
-8
-15
0
15
6 questions
Q.
What is the result of multiplying -7 by 9?
1
30 sec
7.NS.2
Q.
What is the result of multiplying -5 by -3?
2
30 sec
7.NS.2
Q.
What is the result of dividing 70 by -7?
3
30 sec
7.NS.2
Q.
A pizza restaurant sells 6 pizzas every hour. If the restaurant is open for 8 hours, how many pizzas do they sell in total?
4
120 sec
7.NS.2
Q.
A school has 5 classrooms. Each classroom has 25 students. How many students are there in total?
5
120 sec
7.NS.2
Q.
It costs Amanda $2 to make each baked good for a sale at school. If she doesn't sell 8 of them, how much money has she lost?
