식의 계산과 성질 단원 종합

Y.1Fill in the missing number.

1. 1
   $8\times 5=$ $5\times \boxed{}$
2. 2
   $(3\times 3)\times 2=$ $3\times (\boxed{}\times 2)$
3. 3
   $1\times 93=$ ​
4. 4
   $2\times 9=$ $9\times \boxed{}$

Y.2Fill in the boxes. Use the greatest common factor.

1. 5
   $20+10=$ $\boxed{}(\boxed{}+\boxed{})$
2. 6
   $20+5=$ $\boxed{}(\boxed{}+\boxed{})$
3. 7
   $99+55=$ $\boxed{}(\boxed{}+\boxed{})$
4. 8
   $40+48=$ $\boxed{}(\boxed{}+\boxed{})$

Y.3Use the distributive property to write each expression without parentheses.

1. 9
   $9(y+7)$ 
2. 10
   $5(4n+5)$ 
3. 11
   $5(6n+9)$ 
4. 12
   $3(2y+7)$ 

Y.4Factor out the greatest common factor.

1. 13
   $9y+81$ 
2. 14
   $18a+2$ 
3. 15
   $18p+24$ 
4. 16
   $21y+9$ 

Y.5Simplify each expression.

1. 17
   $8+2n+5n+7$ 
2. 18
   $6+6p+7p$ 
3. 19
   $7n+2n+6n+9$ 
4. 20
   $4k+7k+8+8+7k$ 

Y.1Properties of Operations

1. 18
2. 23
3. 393
4. 42

Y.2Factor Sums with the GCF

1. 5$10(2+1)$
2. 6$5(4+1)$
3. 7$11(9+5)$
4. 8$8(5+6)$

Y.3Distributive Property

1. 9$9y+63$
2. 10$20n+25$
3. 11$30n+45$
4. 12$6y+21$

Y.4Factor Linear Expressions

1. 13$9(y+9)$
2. 14$2(9a+1)$
3. 15$6(3p+4)$
4. 16$3(7y+3)$

Y.5Combine Like Terms

1. 17$7n+15$
2. 18$13p+6$
3. 19$15n+9$
4. 20$18k+16$