Testinar Grade 7 math

Multiplying Integers and Rational Numbers

Students will build Grade 7 mastery of multiplying integers and rational numbers using models, equations, and test-style reasoning.

CH03-05 The Number System

Directions Solve each problem. Show your reasoning on the page or on separate paper. Check the answer key only after finishing.

What is \(-6\times\frac{2}{3}\)?
1. \(-9\)
2. \(-4\)
3. \(4\)
4. \(9\)
What is \(5\times 4\)?
1. \(9\)
2. \(18\)
3. \(20\)
4. \(25\)
What is \(-7\times (-3)\)?
1. \(-21\)
2. \(-10\)
3. \(10\)
4. \(21\)
What is \(3\times 0.5\)?
1. \(0.5\)
2. \(1.5\)
3. \(3.5\)
4. \(6\)
What is \(-8\times 2\)?
1. \(-16\)
2. \(-6\)
3. \(6\)
4. \(16\)
What is \(\frac{3}{4}\times 8\)?
1. \(6\)
2. \(8\)
3. \(10\)
4. \(12\)
What is \(-\frac{1}{2}\times 10\)?
1. \(-20\)
2. \(-5\)
3. \(5\)
4. \(20\)
What is \(0.4\times 0.5\)?
1. \(0.2\)
2. \(0.9\)
3. \(1.8\)
4. \(2\)

Teacher and parent reference

Answer key and explanations

B. \(-4\)
\(-6\times\frac{2}{3}=\frac{-12}{3}=-4\). A negative times a positive is negative.
C. \(20\)
Positive times positive equals positive. \(5 \times 4 = 20\).
D. \(21\)
Negative times negative equals positive. \(-7 \times (-3) = 21\).
B. \(1.5\)
\(3 \times 0.5 = 1.5\). Positive times positive is positive.
A. \(-16\)
Negative times positive equals negative. \(-8 \times 2 = -16\).
A. \(6\)
\(\frac{3}{4}\times 8 = \frac{3 \times 8}{4} = \frac{24}{4} = 6\).
B. \(-5\)
\(-\frac{1}{2}\times 10 = \frac{-10}{2} = -5\). Negative times positive is negative.
A. \(0.2\)
\(0.4 \times 0.5 = 0.2\). Count total decimal places: \(4 \times 5 = 20\), then place decimal to get \(0.20 = 0.2\).