Help Your Kids With Maths: A Unique Step-By-Step Visual Guide
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A simple, visual approach to helping your child understand maths. Reduce the stress of studying maths and help your child with their homework, following this unique visual guide which will demystify the subject for everyone. Using clear, accessible pictures, diagrams and easy-to-follow step-by-steps - and covering everything from basic numeracy to more challenging subjects like statistics and algebra - you'll learn to approach even the most complex maths problems with confidence. Includes a glossary of key maths terms and symbols. The perfect guide for every frustrated parent and desperate child, who wants to understand maths and put it into practice.
figures 1 signiﬁcant ﬁgure A signiﬁcant ﬁgure in a number is a digit that counts. The digits 1 to 9 are always signiﬁcant, but 0 is not. However, 0 becomes signiﬁcant when it occurs between two signiﬁcant ﬁgures, or if an exact answer is needed. 3 signiﬁcant ﬁgures 200 200 200 Real value anywhere between 150–249 110,012 round down 2 signiﬁcant ﬁgures Real value anywhere between 195–204 Real value anywhere between 199.5–200.4 3.047 these 0s are not signiﬁcant round down 3 100,000 1
example, 3.5 and 7.2. 7.2 × 7.2 equals 12.25 + 51.84 = c Calculate the squares of each of the triangle’s known sides by multiplying them. 12.25 + 51.84 equals 64.09 = c Add these answers together to find the square of the hypotenuse. 13 cm (hypotenuse) this side is known a + b = c known side the square root of 64.09 is the same as the square root of c2 answer rounded to the hundredths place Use a calculator to find the square root of 64.09. This gives the length of side c. The
one of the most important parts of a circle—its diameter. A circle may also be rotated about its center and still ﬁt into its own outline, giving it a “rotational symmetry” about its center point. ce a r ound the the distan c i rc l e e c n e r e f segment the space m u between a chord and an arc chord a str aight line the cir cumferen ce of the circumference diam eter a line that c uts a circle r sector the space e exac t t n ly e enclosed by two radii a li ne ▷ A circle divided This
triangles. Isosceles triangles have 2 sides and 2 angles that are the same. In this case, two sides of triangles POR and QOR are formed from 2 radii of the circle. angle O subtended from P and Q R O P Q the angle at O is twice the angle at R R these are also right angles subtended from diameter, CD △ Angles subtended from the diameter Any angle at the circumference that is subtended from two points either side of the diameter is equal to 90°, which is a right angle. circumference (edge
÷ –1 –p > –3 △ Multiplying or dividing by a negative number When an inequality is multiplied or divided by a negative number, its sign is reversed. In this example, a less than sign becomes a greater than sign.