ffirs.indd

Simple Division 133 Or like this: 4 37^121 9 We now divide 4 into 12. What number multiplied by 4 gives an answer of 12? Th e an ...

134 Speed Math for Kids Th e calculation begins as usual. Th ree divides once into 5 with 2 remainder. We carry the 2 remainder ...

Simple Division 135 1 8 9.2 6 3 5262 7.8^200 Th ree divides into 20 six times (6 × 3 = 18), with 2 remainder. Th e remainder is ...

136 Speed Math for Kids Here is how it works. We are dividing 56 by 8. We set up the problem as above, or, if you prefer, you ca ...

Simple Division 137 Nine is 1 below 10, so we write 1 in the circle below the 9. Add the 1 to the tens digit (7) to get an answe ...

138 Speed Math for Kids 4 6 r4 8 5^12 2 We multiply the two circled numbers, 2 × 4 = 8. We take 8 from the units digit, now 12; ...

Simple Division 139 Remainders Let’s go back to our problem at the beginning of the chapter. How would we divide 33 math books a ...

140 Speed Math for Kids We could also have applied our shortcut to the 11 remainder. Th e fi rst digit is 1, which we add to our ...

141 CChapter 14hapter 14 = 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 ...

142 Speed Math for Kids What can we use as factors? Four times 9 is 36, and so is 6 times We could also use 3 times 12. Let’s t ...

Long Division by Factors 143 We now divide 6 into 54. What do we multiply by 6 to get an answer of 54? Th e answer is 9. Nine ti ...

144 Speed Math for Kids A good general rule for dividing by factors is to divide by the smaller number fi rst and then by the la ...

Long Division by Factors 145 Double both numbers. Two times 11 is 22, and two times 20 is 40; so 1,120 doubled is 2,240. Th irty ...

146 Speed Math for Kids We have to be careful with the remainder. Th e 2 remainder we obtained is not the remainder for the orig ...

Long Division by Factors 147 WORKING WITH DECIMALS We can divide numbers using factors to as many decimal places as we like. Put ...

148 Speed Math for Kids To round off to six decimal places, we look at the seventh digit, which is a 5. If the next digit is 5 o ...

149 = 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 ( ) % < ...

150 Speed Math for Kids We set up the problem like this: 29 12345 We then proceed as we did for short division. We try to divide ...

Standard Long Division Made Easy 151 We bring down the next digit of the number we are dividing and write an X beneath to remind ...

152 Speed Math for Kids 425 29 12345 116XX 74 58 165 145 20r Our answer is 425 with 20 remainder. Th e calculation is done. Our ...