1.5 Squares and Square Roots

• Squares of whole numbers, fractions and decimals
• Square roots of whole numbers, fractions and decimals

• determine the squares of whole numbers, fractions, and decimals by multiplication in different situations
• determine the square roots of whole numbers, fractions, and decimals of perfect squares in different situations
• appreciate the use of squares and square roots in real-life situations

“Where do we apply squares and square roots in daily activities?”

“How do we apply squares and square roots in daily activities?”

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1. Squares of whole numbers
   40 min · 1 practice tasks · quiz
   Find a whole-number square with a grid, with long multiplication, and with a calculator check.
2. Squares of fractions and decimals
   40 min · 1 practice tasks · quiz
   Square a fraction by squaring top and bottom; square a decimal by multiplying it by itself and counting places.
3. Square roots of perfect-square whole numbers
   40 min · 1 practice tasks · quiz
   Find the positive square root of a perfect square by pairing prime factors, and check by squaring.
4. Square roots of fractions and decimals
   40 min · 1 practice tasks · quiz
   Find roots of fractions and decimals that are perfect squares, by taking roots of both parts or by rewriting the decimal as a fraction.
5. Squares and square roots in real life
   40 min · 1 practice tasks · quiz
   Use side squared for the area of a square plot, tile or table, and the square root for a missing side.