1、 4 / 8 () 20.2 () 8 / 15 / 3 m () 6 cm 2、 A = 3 × 5 × 7, B = 3 × 5 × 11, the least common multiple of a and B is ()? A.15 B.1155 C.105 If the denominator of a fraction is multiplied by 4, and the size of the fraction remains unchanged, the numerator factor ()? A. Multiply 4 B. divide 4 C. don't change

1、 4 / 8 () 20.2 () 8 / 15 / 3 m () 6 cm 2、 A = 3 × 5 × 7, B = 3 × 5 × 11, the least common multiple of a and B is ()? A.15 B.1155 C.105 If the denominator of a fraction is multiplied by 4, and the size of the fraction remains unchanged, the numerator factor ()? A. Multiply 4 B. divide 4 C. don't change

1、 8 / 4 (=) 2
0.2 (>) 1 / 8
3 / 5 m (>) 6 cm
2、 A = 3 × 5 × 7, B = 3 × 5 × 11. What is the least common multiple of a and B?
A.15 B.1155 C.105
If the denominator of a fraction is multiplied by 4, to keep the size of the fraction unchanged, what is the molecular factor (a)?
A. Multiply 4 B. divide 4 C. don't change

(1-16:3 × 9:8) × 12:5

（1-3/16×8/9）÷5/12
=（1-1/6）÷5/12
=5/6×12/5
=2
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