Hanin's Estimating Square Roots q's 10-11 pg's98-99

10. Kai uses an entire can of paint on a square backdrop for the school play.The label on the can states that on can covers 27cm of wall surface. Estimate the backdrops side length, to one decimal place.

Answer:

25 27 36
5 5.3 6


The backdrop side length to one decimal is 5.3cm


11. The square has an area of 20cm


a) Use perfect squares to estimate the side length to one decimal place.


b) Check your answers using a ruler to measure the side of the square. measure to the nearest tenth of a centimeter.


Answers:



a) 16 20 25
4 4.5 5

The side length to one decimal place of 20cm is 4.5cm.

b) the side of the square 20cm measured to the nearest tenth of a centimeter is 4,5

Hanin's sesame street video

This video my Wanna Buy a Rate

Ratios
A two term is ratio : compares two quantities measured in the same units
A three term ratio : compares three quantities measured in the sme units
A part to part to part ratio : compares different parts of a group to each other
A part to whole ratio: compares one part of a group to the whole group

Rates

A rate: compares two quantities in different units
A unit rate: is a rate in which the second term is one
A unit price: compares costs of different items when shopping

Proportional Reasoning

a proportion: is a relationship that says that two ratios or two rates are equal