## Online teaching

That’s it. We are at home; we can’t go outside (I live in Italy) unless we have to buy groceries or medicines. School are being closed since the beginning of March, and we don’t know when and if will open again. I’m locked at my place and I’m scared, I have to admit. I’m afraidContinue reading “Online teaching”

## Valentine’s day – Fractions activity

Do you need a fun activity for Valentine’s day? check: https://www.teacherspayteachers.com/Product/Valentines-day-Fractions-activity-5208570 No prep, ready to print activity for Valentine’s day, including colouring activity with equivalent fractions and additions and subtactions. Copyright © 2020 Matemaths All rights reserved by author. Permission to copy for single classroom use only Not for public display. If you are lookingContinue reading “Valentine’s day – Fractions activity”

## Monomials part 2

Multiplying Monomials When you multiply monomials, you will need to perform two steps: Multiply the coefficients (constants) Multiply the variables, using the famous laws of indices! For example For example Dividing Monomials Let’s start by taking a look at a few problems in “expanded form”. Once you examine these examples, you’ll discover the rule onContinue reading “Monomials part 2”

## Monomials part 1

Monomials A monomial is an algebraic expression that consists of only one term. (A term is a numerical or literal expression with its own sign.) For instance, 9x , -4a², and  3mpx³ are all monomials. The number in front of the variable is called the numerical coefficient. In -9xy, -9 is the coefficient. Adding and subtracting monomials To add or subtract monomials, followContinue reading “Monomials part 1”

## Relative numbers (part 2)

Multiplying Positive and Negatives numbers We can only do arithmetic in the usual way. To calculate 5(−2), we have to do 5· 2 = 10 — and then decide on the sign. Is it +10 or −10? For the answer, we have the following Rule of Signs. Rules of signs Like signs produce a positiveContinue reading “Relative numbers (part 2)”

## Sphere

A sphere is the set of all points, in three-dimensional space, which are equidistant from a point. The radius has one endpoint on the sphere and the other endpoint at the center of that sphere. The diameter of a sphere must contain the center and touch two points of the sphere. The largest circular cross-section in a sphere is a greatContinue reading “Sphere”

## Cone

A cone is a solid with a circular base and sides that taper up towards a vertex. A cone is generated from rotating a right triangle, around one leg. A cone has a slant height. Surface area Surface area is a two-dimensional measurement that is the total area of all surfaces that bound a solid. The basic unit ofContinue reading “Cone”

## Cylinder

A cylinder is a three-dimensional shape with a pair of parallel and congruent circular ends, called bases. Cylinders can be right or oblique. The side of a right cylinder is perpendicular to its circular bases. A cylinder has a single curved side that forms a rectangle when laid out flat. Surface area of a cylinder The area ofContinue reading “Cylinder”