ffirs.indd

173 CChapter 18hapter 18 = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 ...

174 Speed Math for Kids If you know that half of 10 is 5, you have done a calculation involving fractions. You have half of your ...

Fractions Made Easy 175 you simply add the numerators. For instance, if you wanted to add one-eighth plus two-eighths, you would ...

176 Speed Math for Kids (^1) + (^2) = 3 5 1 × 5 = 5 3 × 2 = 6 5 + 6 = 11 Eleven is the top number (the numerator) of the answer. ...

Fractions Made Easy 177 Let’s try one more. (^2) + (^3) = 16 + 15 = 31 5 8 40 40 Simplifying answers In each of these examples, ...

178 Speed Math for Kids divide the top number by the bottom, and express the remainder as a fraction. So, 12 divides one time in ...

Fractions Made Easy 179 For you just to look at a problem like this and call out the answer will make everyone think you are a g ...

180 Speed Math for Kids (^2) – (^1) = 8 – 3 = 5 3 4 12 12 What we did was multiply 2 × 4 = 8, and then subtract 3 × 1 = 3, to ge ...

Fractions Made Easy 181 Test you rself Try these for yourself (do them in your head): a)^1 /^4 –^1 /^5 = b)^1 / 2 –^1 / 6 = c)^1 ...

182 Speed Math for Kids Here is how we do it. We simply multiply the numerators to get the numerator of the answer, and we multi ...

Fractions Made Easy 183 So, the answer is 17 divided by 2, which is 8 with 1 remainder. Th e remainder goes to the top (numerato ...

184 Speed Math for Kids CHANGING COMMON FRACTIONS TO DECIMALS Th e fractions we have been dealing with are called common fractio ...

185 = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < ...

186 Speed Math for Kids 6 × 10 = 60 6 × 7 = 42 60 + 42 = 102 Answer How about 6 times 27? Six times 20 is 120 (6 × 2 × 10 = 120) ...

Direct Multiplication 187 63 – 21 = 42 42 × 10 = 420 3 × 7 = 21 420 + 21 = 441 (10 × 7) 7 × 63 420 –3 –7 21 –21 441 Answer Th e ...

188 Speed Math for Kids By direct multiplication, we have: 8 × 20 = 160 8 × 7 = 56 160 + 56 = 216 Now using two reference number ...

Direct Multiplication 189 How would you use this method to solve 34 × 76? One method would be to use 30 as a reference number an ...

190 Speed Math for Kids 76 × 34 24 7 × 4 = 28 3 × 6 = 18 28 + 18 + 2 carried = 48 76 × 34 4824 7 × 3 = 21 + 4 carried = 25 76 × ...

Direct Multiplication 191 Now we multiply crossways: 3 × 6 and 7 × 4, and then multiply the answer by 10. 3 × 6 = 18 7 × 4 = 28 ...

192 Speed Math for Kids numbers to solve problems in direct multiplication. If you try it and you think it is too diffi cult, fo ...