(13)

of 2 of 1 of 3 × of =

3 10 3 x 33 x 64 x 266 × 3 × 10 11 19 8 x 16 x 63 x 87 x 11 x 19 3 x 3 x 11 x 8x8×2×7× 19 × 3 × 2 × 5 10 8x8x2x7x3x3x3x 29 x 11 x 19

X

29

15 16 11 72 21 15 x 16 x 11 × 72 × 21

(2) X X X
64 27 10

X 385 85

5 × 3 × 16 x 11x4×2×9×3×7
X

4 x 16 x 3 x 9×2× 5 × 11x5x7x5x17

X × 522 of 49 ×

32 x 8 x 44 x 33 x 19 x 111 x 49 x 3

15 x 3 x 37 x 42 × 328 × 22 × 76

4x8x2×2×2× 11 ×4 × 3 × 11 × 19 × 3 × 37 x7x7x3

5 x 3 x 3 x 37 x 2×3×7 × 8 × 41 × 2 × 11 × 4 × 19

3

76

3 7 11

3+

1)

3. (1) (2 + 7 of 51 ) × (5 + 2 + 3 ) = )=(+x쯤)×(8+%+20+요)

3

43 21 43 × 3 × 7

2 × 3 × 4

82

10 3+ + 12

9

+

12

=

4

301
8

125

5 x 3 x 23

47 x 3 x 3

12

37.

25 of X 7

8 x 23

7x3

=