Chapters 3-4 test mat 155-1

# Chapters 3-4 test mat 155-1 - Chapters 3-4 Cumulative Test...

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Chapters 3 -4 Cumulative Test Name: Dana Dutch 1. Subtract. 8 1 11 5 - So you have to find the GCF of both of the fractions. The GCF between 11 and 5 is 55. So now you times it by how much it goes by 8*5=40 and 11*5=55 . 5*11=55 and 1*11=11 now the problem looks like this 55 29 55 11 55 40 = - 2. Find the least common multiple of 24 and 48. 24=12*2 48=24*2 so the lease common multiple is 2 3. Subtract. 7 8 1 9 - = - 9 16 1 8 now you find the LCM and that is 9. 9 2 6 9 56 9 16 9 72 or = -

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4. Add. 3 2 8 7 + 56 37 56 16 56 21 7 2 8 3 = + = + 5. Add. Write the answer in lowest terms. 2 2 6 7 7 7 + + = 7 3 1 7 10 or 6. Which is larger, 11 13 or 3 10 ? 11/13 - 3/10 = 110/130 - 39/130 = 71/130 that is > 0 so 11/13 is larger 7. Estimate the following sum. 1 9 1 7 4 7 2 5 9 10 7 8 + + + So this is how I did the problems 10 79 9 37 + so than you find the common of both and its 90 so 90 1081 90 711 90 370 = +
then I took the second half of = + 8 47 7 15 now you find the LCM and that is 56. so now the

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Chapters 3-4 test mat 155-1 - Chapters 3-4 Cumulative Test...

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