6학년 1분기 시험

Use the divisibility rules for 2, 3, 4, 5, 6, 9, and 10. When asked which divide a number, list all of them.

1. 1
   Is 40,827 divisible by 3? 
2. 2
   Is 51,325 divisible by 4? 

List all the factor pairs.

1. 5
   List all the factor pairs of 111.
2. 6
   List all the factor pairs of 162.

Write each prime factorization using exponents.

1. 7
   Write the prime factorization of 184 using exponents.
2. 8
   Write the prime factorization of 504 using exponents.

Find each GCF.

1. 9
   Find the greatest common factor (GCF) of 7 and 21.
2. 10
   Find the greatest common factor (GCF) of 39, 130, and 117.

Find each LCM.

1. 11
   Find the least common multiple (LCM) of 10 and 9.
2. 12
   Find the least common multiple (LCM) of 5, 7, and 14.

Answer each question.

1. 13
   Find the least common multiple (LCM) of 12 and 5.

Add or subtract. Line up the decimal points.

1. 14
   6.7

   +18.6
2. 15
   90.88

   +50.36
3. 16
   50.345

   −3.250
4. 17
   310.936

   +963.700

Round each decimal to the place named, then add or subtract to estimate.

1. 18
   Nearest whole number: $33.13+54.47$
2. 19
   Nearest tenth: $17.86-12.91$

Use the fact given to find each product or quotient.

1. 20
   $59\times 89=5,251,\text{ so }5.9\times 8.9=$ 

Multiply.

1. 21
   8.5

   ×0.3
2. 22
   4.46

   ×9.6
3. 23
   12.65

   ×1.3

Multiply or divide.

1. 24
   $9.4\times 100=$ 
2. 25
   $4.1÷10^1=$ 
3. 26
   $1.09÷10^1=$ 

Divide.

1. 29
   7.6110.124
2. 30
   1.441.734