Operations with Decimals
Grade 7 · Math · Operations with Rational Numbers · Manitoba, Canada
Lesson Summary
Perform addition, subtraction, multiplication, and division with positive and negative decimals.
Explanation
Working with decimals follows the same sign rules as integers. For addition and subtraction, line up the decimal points. For multiplication, multiply as if there were no decimals and then count the total decimal places. For division, move the decimal point in the divisor to make it a whole number and shift the decimal in the dividend the same number of places.
Practice Questions
Q1: Calculate −3.7 + 1.2.
Answer: Different signs: 3.7 − 1.2 = 2.5, and the larger absolute value is negative, so the answer is −2.5.
Q2: Calculate (−0.6) × (−0.5).
Answer: Both negative: 0.6 × 0.5 = 0.30, so the answer is 0.3.
Q3: Calculate −4.8 ÷ 1.6.
Answer: 4.8 ÷ 1.6 = 3, and the signs differ, so the answer is −3.
People Also Ask
What is Operations with Decimals in Grade 7 Math?+
Operations with Decimals is a lesson in the Operations with Rational Numbers chapter of Grade 7 Math. It is part of the Manitoba, Canada school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Operations with Decimals?+
Operations with Decimals is taught in Grade 7 as part of the Math curriculum in Manitoba, Canada.
How can I help my child with Operations with Rational Numbers in Math?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Operations with Rational Numbers topics.