Understand how common denominator is a common multiple of the denominator of two or more fractions with unlike denominators. Learn how to write rewrite unlike fractions using common denominators.
Learn to compare decimal numbers by lining up the decimal point and then comparing digits to find a place where the digits are different. Visually compare positive and negative decimals on the number line.
Understand that an exponent is a number that indicates how many times a number or expression is used as a factor. Work with positive and negative exponents.
Use fraction bars, fraction charts, and number lines to visually compare positive and negative fractions and mixed numbers. Learn how to rewrite fractions using a common denominator and then compare the numerators.
Discover why fraction multiplication can be performed by multiplying the numerators and denominators. Learn how to multiply improper fractions and mixed numbers.
Learn how to add and subtract signed integers using counter and number line models. Discover how to rewrite addition as subtraction and subtraction as addition.
Investigate division of integers using counters and directional line models on the number line. Explore how the sign of the divisor and dividend determines whether the quotient is positive or negative.
Understand integer multiplication as repeated addition or subtraction using visual models. Investigate how the sign of the factors determines whether the product is positive or negative.
Examine how ratios compare different quantities. Understand that ratios can be written in several different ways and can describe part to part or part to whole comparisons.
Discover how rounding is a process which produces another number that is close to the original number. Learn how to round numbers up or down to the nearest rounding number.