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Medeiros unit 1 rev
10/8 test for unit 1
| Question | Answer |
|---|---|
| write the number 30 with all prime numbers | 2X5X3 (you can use a factor tree to help) |
| which of the numbers are prime? 4,10,3,2,13,21 (prime numbers only have two factors) | 3,2,13 |
| Write the factors of 36 1,2,3,4, 6,9,12,36 (make a T chart to help) | FACTORS 1,2,3,4, 6,9,12,36 |
| Is 37 prime or composite? | prime it only has 1 and 37 as factors |
| Is 237 divisible by 3 (you can add all the digits and if the sum is a number divisible by 3 then it divisible) | 237 is divisible by 2+3+7=12 and three goes into 12 |
| is 250 divisible by 5 | yes because the number ends in 5 or 0 |
| is 173 divisible by 3 | no because when you add the digits in 173 you get 11. |
| least common multiple the numbers get__________as you list them | larger |
| Finding multiplies is like skip counting. So the multiples of | 3 are 3,6,9,12,15.... |
| find the least common multiple of 6 and 10 | 30 |
| find the least common multiple of 12 and 8 | 24 |
| greatest common factor | the largest factor that two numbers have in common (that are the same) |
| list the factors of 24 make a T chart to help | 1,2,3,4,6,8,12,24 |
| Distribute is like passing out candy. | you must distribute candy to all of the class!!!! |
| Distributive property involves _____________ | multiplication |
| write and equivalent (equal) expression using the distributive property 5(3+2) | 5 X 3 + 5X2 |
| Divide to find the quotient (answer) 4815 divided by 9 you can make a number bank with the 9 tables to help | 535 |
| A school auditorium has 450 total seats. There are 50 rows. How many seats are in each row???? You know it has to be less than 450 so you either subtract or divide. In this case_________ | divide the answer is 9 |
| you can make a simpler problem to help you figure out what operation to do. | |
| Write and equivalent expression for 5(3+7) | you could answer two ways 5X3 +5 X8 or 15 + 40 |
| Whats' the GCF of 12 and 36? use a T chart to help | 12 |
| Shawna is having a party for her birthday. She wants to make basket that will be identical to each other. She has 20 kites, 30 lollipops and 10 rings. What is the MOST bags she can make? | The key word is MOST so think GREATEST is the same as MOST. So use the GCF to solve. 10 is the GCF |
| which is the PRIME factorization for 48 2X3X8 or 2X3X2X2X2 | Although 2X3X8 =48 8 is not prime you still have to break it down. 2X3X2X2X2 is correct |
| is 7291 divisible by 9 | no. the sum of the digits have to be divisible by 9 7+2+9+1=19 |
Created by:
kristenmedeiros
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