Urutkan bilangan berikut dari yang terkecil (dan caranya) 1) A. 2/7 , 45% , 0,50 , 0,7 B. 4/5 , 55‰ , 45% , 0,5 Tentukan hasil penjumlahan berikut (dan caranya)

1a) menentukan KPK dari penyebut terlebih dahulu.
KPK dari 7, 10, dan 100 = 700
2/7 = 200/700
45% = 45/100 = 315/700
0,50 = 50/100 = 350/700
0,7 = 7/10 = 490/700
urutkan pembilang dari yang terkecil: 200/700, 315/700, 350/700, 490/700 atau 2/7, 45%, 0,50, 0,7

1b) menentukan KPK dari penyebut terlebih dahulu.
KPK dari 5, 10, 100, dan 1000 = 1000
4/5 = 800/1000
55%0 = 55/1000
45% = 450/1000
0,5 = 5/10 = 500/1000
urutkan pembilang dari yang terkecil: 55/1000, 450/1000, 500/1000, 800/1000 atau 55%0, 45%, 0,5, 4/5

2a) [tex] 2\frac{1}{3} + \frac{3}{4} = \frac{7}{3} + \frac{3}{4} = \frac{28}{12} + \frac{9}{12} = \frac{37}{12} = 3\frac{1}{12}[/tex]

2b) [tex] \frac{2}{3} + 3 \frac{5}{9} = \frac{2}{3} + \frac{32}{9} = \frac{6}{9} + \frac{32}{9} = \frac{38}{9} = 4\frac{2}{9}[/tex]

2c) [tex] \frac{2}{3} + 2 \frac{1}{2} + 3 \frac{1}{4} = \frac{2}{3} + \frac{5}{2} + \frac{13}{4} = \frac{8}{12} + \frac{30}{12} + \frac{39}{12} = \frac{77}{12} = 6\frac{5}{12}[/tex]

3a) [tex] \frac{2}{15} - \frac{1}{2} + \frac{3}{10} = \frac{4}{30} - \frac{15}{30} + \frac{9}{30} = -\frac{2}{30} = -\frac{1}{15}[/tex]

3b) [tex] 10\frac{1}{4} + 1\frac{2}{3} + 20\frac{7}{8} = \frac{41}{4} + \frac{5}{3} + \frac{167}{8} = \frac{246}{24} + \frac{40}{24} + \frac{501}{24} = \frac{787}{24} = 32\frac{19}{24} [/tex]

3c) 2,25 + 25% + [tex]1\frac{1}{2} = \frac{225}{100} + \frac{25}{100} + \frac{3}{2} = \frac{225}{100} + \frac{25}{100} + \frac{150}{100} = \frac{400}{100} = 4[/tex]

4a) [tex] \frac{7}{30} + \frac{3}{20} - 4\frac{1}{4} = \frac{7}{30} + \frac{3}{20} - \frac{9}{4} = \frac{14}{60} + \frac{9}{60} - \frac{135}{60}  = -\frac{112}{60} = 1\frac{52}{60} [/tex]

4b) [tex] \frac{4}{9} + \frac{11}{18} + \frac{5}{27} - 4\frac{2}{3}= \frac{4}{9} + \frac{11}{18} + \frac{5}{27} - \frac{14}{3} = \frac{24}{54} + \frac{33}{54} + \frac{15}{54} - \frac{378}{54} = -\frac{306}{54} = -5\frac{36}{54} = -5\frac{2}{3}[/tex]

(jangan lupa jawaban terbaik ama bintangnya yaaa...)