ffirs.indd
Standard Long Division Made Easy 153 Remember that these calculations are really only estimates. If you are dividing by 31 and y ...
154 Speed Math for Kids Twenty-nine is less than 30 and 30 divides into 239 almost 8 times, as it is only 1 less than 240, which ...
Standard Long Division Made Easy 155 as a decimal), because we doubled the numbers we are working with, the remainder will be do ...
156 Speed Math for Kids Note to parents and teachers I was speaking to teachers at a special government program in the United St ...
157 = 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 ( ) % < ...
158 Speed Math for Kids Th ree won’t divide into 1 so we divide the fi rst two digits by 3. Th ree divides into 19 six times wit ...
Direct Long Division 159 places. (Always add one more 0 than the number of decimal places required.) Our problem now looks like ...
160 Speed Math for Kids Th e next step would be to multiply 4 times 2 to get 8. We subtract 8 from our remainder, which is 0, so ...
Direct Long Division 161 minus 16 is –16. We can’t work with –16, so the last digit of our answer was too high. 32 –2 8 30 24.0 ...
162 Speed Math for Kids Th e problem now looks like this: 32 –2 5 30 24.^3010 Th is is not diffi cult, but you need to keep in ...
Direct Long Division 163 Our answer is 5 with 36 remainder. 39 +1 5 r36 40 23.^31 Remember, these are only estimates. In the fol ...
164 Speed Math for Kids 39 +1 8 40 31.-1 9 Four times 8 is 32, with –1 remainder, which we carry as –10, and we ignore the 9 for ...
Direct Long Division 165 we add to 0 for our next working number. Seven divided by 3 is 2, with 1 remainder, which we carry to t ...
= 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 ( ) % < &g ...
Checking Answers (Division) 167 To check the answer to the problem 578 ÷ 17 = 34, we would use substitute numbers. 578 ÷ 17 = 34 ...
168 Speed Math for Kids Th e answer checks correctly. If you are not sure how to check a problem in division, try a simple probl ...
Checking Answers (Division) 169 BONUS: CASTING OUT TWOS, TENS AND FIVES Just as it is possible to check a calculation by casting ...
170 Speed Math for Kids We divide by 5 and just use the remainder. Again, we are only working with the units digits. Five divide ...
Checking Answers (Division) 171 Seven is 9 minus 2 and 8 is 9 minus 1, so our substitute numbers are –2 and –1. So long as they ...
172 Speed Math for Kids subtracting from. Th is is because minus substitutes change a plus to a minus and a minus to a plus. How ...
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