D) Multiply the following rational numbers:
1 4
1) - X -
6) 0.23 x (-1.5)
4 5
3
2)
7) (-1.01) × (-12)
2 4
3 5
3) - X
8) 1.11 x (0.001)
8 24
35
4) = x
4 6
9) (-12.75) (0.75)
2 6
5
5)
10) 2.54 x 9.5
7
1 4
1) - X -
6) 0.23 x (-1.5)
4 5
3
2)
7) (-1.01) × (-12)
2 4
3 5
3) - X
8) 1.11 x (0.001)
8 24
35
4) = x
4 6
9) (-12.75) (0.75)
2 6
5
5)
10) 2.54 x 9.5
7
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Answer:
1. 1/4 × 4/5
4/20 ÷ 4/4
= 1/5
2. 1/2 × 3/4
= 3/8
3. 3/8 × 5/24
3÷3/8 × 5/24÷3
1/8 × 5/8
= 5/64
4. 3/8 × 5/6
3÷3/8 × 5/6÷3
1/8 × 5/2
= 5/16
5. 2/9 × 6/7
2/9÷3 × 6÷3/7
2/3 × 2/7
= 4/21
6. 0.23 × (-1.5)
= -0.345
7. (-1.01) × (-1.2)
= 1.212
8. 1.11 × (0.001)
= 0.00111
9. (-12.75) × (0.75)
= -9.5625
10. 2.54 × 9.5
= 24.13