5. -1/10
6. 12/35
7. -1 1/24 (mixed number)
8. 1 7/8 (mixed number)
9. -1 1/8 (mixed number)
10. 9 9/35 (mixed number)
Solution:
5.) 2/5 - 3/6 = 12/30 - 15/30 = -3/30 lowest term by dividing into 3, so the answer is -1/10
6.) 3/7 x 4/5 = 12/35
Why? 3x4= 12 and 7x5 is 35.
7.) 5/8 (-5/3) = -25/24
5x (-5) = -25 and 8x (-3) is -24
Since, this is improper fraction, make it as mixed number, the answer is -1 1/24
8.) 3/4 ÷ 2/5 = (do cross multiplication)
15/8 = 15÷ 8 = 1 r. 7, so the answer is 1 7/8
9.) 9/10÷ (-4/5) = (do cross multiplication)
9x (-5) = -45 and 10 x (-4) is -40
So, -45/40 in mixed number is -1 5/40, then lowest term by 5 is -1 1/8. (mixed number yan ha.)
10.) 3 6/7 x 2 2/5 =
Make it in improper fraction.
3 6/7 is 27/7 and 2 2/5 is 12/5
27/7 x 12/5 =
27x 12 is 324 and 7x5 is 35, so we can have 324/35. Turn it in mixed number, and the answer is 9 9/35.
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Answers & Comments
5. -1/10
6. 12/35
7. -1 1/24 (mixed number)
8. 1 7/8 (mixed number)
9. -1 1/8 (mixed number)
10. 9 9/35 (mixed number)
Solution:
5.) 2/5 - 3/6 = 12/30 - 15/30 = -3/30 lowest term by dividing into 3, so the answer is -1/10
6.) 3/7 x 4/5 = 12/35
Why? 3x4= 12 and 7x5 is 35.
7.) 5/8 (-5/3) = -25/24
5x (-5) = -25 and 8x (-3) is -24
Since, this is improper fraction, make it as mixed number, the answer is -1 1/24
8.) 3/4 ÷ 2/5 = (do cross multiplication)
15/8 = 15÷ 8 = 1 r. 7, so the answer is 1 7/8
9.) 9/10÷ (-4/5) = (do cross multiplication)
9x (-5) = -45 and 10 x (-4) is -40
So, -45/40 in mixed number is -1 5/40, then lowest term by 5 is -1 1/8. (mixed number yan ha.)
10.) 3 6/7 x 2 2/5 =
Make it in improper fraction.
3 6/7 is 27/7 and 2 2/5 is 12/5
27/7 x 12/5 =
27x 12 is 324 and 7x5 is 35, so we can have 324/35. Turn it in mixed number, and the answer is 9 9/35.