Estimating Sums and Differences Estimating Products and Quotients Factors and GCF Multiples and GCM Prime and Composite Numbers

Estimating Sums and Differences questions follow

Question Find the sum. Check to see if your answer is reasonable by rounding to the nearest hundred = 10 Estimating Sums and Differences

Answer = = Estimating Sums and Differences

Question Find the difference. Check to see if your answer is reasonable by rounding to the nearest hundred. 836 – 487 = 20 Estimating Sums and Differences

Answer 836 – 487 = – 500 = Estimating Sums and Differences

Question Do you need an estimate or an exact answer? Decide and then solve. Avin spent $13.99 on a sweater, $6.29 on a pair of socks, and $7.98 on My Little Pony pajama pants. About how much money did he spend in all? 30 Estimating Sums and Differences

Answer Estimate! $13 + $6 + $8 = About $27 in all. 30 Estimating Sums and Differences

Question Do you need an estimate or an exact answer? Decide and then solve. A bottle contains 784 milliliters of milk. A family drinks 309 milliliters of milk at breakfast and the rest at dinner. How much did they drink at dinner? 40 Estimating Sums and Differences

Answer Exact answer! 784 – 309 = 475 milliliters left 40 Estimating Sums and Differences

Question Decide if you need an estimate or an exact answer. Then solve. Mrs. O’Connor wants to buy Mac a totally unnecessary gold-plated dog bowl. The dog bowl costs $857. Mrs. O’Connor has $325. About how much more money will Mrs. O’Connor need to buy the dog bowl? 50 Estimating Sums and Differences

Answer Estimate! $900 - $300 = About $600 more 50 Estimating Sums and Differences

Estimating Products and Quotients questions follow

Question Estimate the product: 42 x 4 = 10 Estimating Products and Quotients

Answer What is 40 x 4 = 160? 10 Estimating Products and Quotients

Question Estimate the product: 72 x 26 = 20 Estimating Products and Quotients

Answer What is 70 x 30 = 2,100? 20 Estimating Products and Quotients

Question Estimate the product: 567 x 7 = 30 Estimating Products and Quotients

Answer What is 600 x 7 = 4,200? 30 Estimating Products and Quotients

Question Estimate the quotient (this will be a bonus on the test!): 335 ÷ 8 = 40 Estimating Products and Quotients

Answer What is 320 ÷ 8 = 40? 40 Estimating Products and Quotients

Question Decide whether you need an estimate or an exact answer. Then solve. Mrs. Fickert buys 8 boxes of crayons for her class. Each box contains 64 crayons. About how many new crayons will the class get? 50 Estimating Products and Quotients

Answer Estimate! 8 x 60 = About 480 new crayons 50 Estimating Products and Quotients

Factors and GCF questions follow

Question List the factors of Factors and GCF

Answer What are 1, 2, 3, 4, 6, 8, 12, 24? 10 Factors and GCF

Question What is the sum of all the factors of 55? 20 Factors and GCF

Answer What is = 72? 20 Factors and GCF

Question Name the common factors of 12 and Factors and GCF

Answer What are 1, 2, 3, 6? 30 Factors and GCF

Question What is the GCF of 32 and 42? 40 Factors and GCF

Answer What is 2? 40 Factors and GCF

Question What is the GCF of 48 and 72? (Hint: The division method may help here.) 50 Factors and GCF

Answer What is 24? 50 Factors and GCF

Multiples and GCM questions follow

Question What are the first 7 multiples of 4? 10 Multiples and GCM

Answer What are 4, 8, 12, 16, 20, 24, 28? 10 Multiples and GCM

Question Find a common multiple of 3 and Multiples and GCM

Answer What is 12, 24, 36, etc.? 20 Multiples and GCM

Question What is the least common multiple (LCM) of 6 and 8? 30 Multiples and GCM

Answer What is 24? 30 Multiples and GCM

Question What is the least common multiple (LCM) of 6 and 9? 40 Multiples and GCM

Answer What is 18? 40 Multiples and GCM

Question LeSean McCoy and Jeremy Maclin are running laps during practice. McCoy finishes a lap every 4 minutes and Maclin finishes a lap every 3 minutes. If they start running at the same time, they will meet again at the finish line after finishing the _____th lap. (Hint: Think about common multiples)! 50 Multiples and GCM

Answer What is the 12 th lap? 50 Multiples and GCM

Prime and Composite Numbers questions follow

Question List the factors of 5. Is it a prime number? 10 Prime and Composite Numbers

Answer What is 1,5 – PRIME? 10 Prime and Composite Numbers

Question List the factors of 9. Is it a prime number? 20 Prime and Composite Numbers

Answer What are 1,3, 9 – NOT PRIME? 20 Prime and Composite Numbers

Question List the factors of 63. Is it a prime number or a composite number? 30 Prime and Composite Numbers

Answer What are 1, 3, 7, 9, 21, 63 – COMPOSITE? 30 Prime and Composite Numbers

Question List two prime numbers that are less than Prime and Composite Numbers

Answer What are 2, 3, 5, 7, 11, 13, 17, 19? 40 Prime and Composite Numbers

Question Explain why 1 is NOT a prime number or a composite number. 50 Prime and Composite Numbers

Answer What is 1 has only one factor – 1! A prime number has exactly 2 factors – itself and 1. A composite number has more than two factors. 50 Prime and Composite Numbers