21. K - 3 2/5 = 7/10K - 17/5 = 7/10K = 7/10 + 17/5K = 7/10 + 34/10K = 41/10 = 4 1/1022. 7/8 + 2/8 - n = 3/47/8 + 2/8 - 3/4 = n7/8 +2/8 - 6/8 = n3/8 = nn = 3/823. 0,84 - 0,62 + 1,005 = 1,22524. 2 3/10 + 1 1/523/10 + 6/523/10 + 12/1035/107/23 1/2Semoga membantu Maaf Jika salah
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21. K - 3 2/5 = 7/10
K - 17/5 = 7/10
K = 7/10 + 17/5
K = 7/10 + 34/10
K = 41/10 = 4 1/10
22. 7/8 + 2/8 - n = 3/4
7/8 + 2/8 - 3/4 = n
7/8 +2/8 - 6/8 = n
3/8 = n
n = 3/8
23. 0,84 - 0,62 + 1,005 = 1,225
24. 2 3/10 + 1 1/5
23/10 + 6/5
23/10 + 12/10
35/10
7/2
3 1/2
Semoga membantu
Maaf Jika salah
2.7/8+2/8-3/4=9/8-3/4=9/8-6/8=3/8
3.0,84-0,65+1,005=0,19+1,005=1,195
4.2 3/10+1 1/5=2 3/10+1 2/10=3 5/10=3 1/2