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11.(15+5=20)²:(10²)-3²=400:100-9=-5
12.8²+5²-6²=64+25-36=53
13.15²-9²+3²=duhh males tau ah
20 ² : 10² - 3²
400 : 100 - 9
4 -9 = -5
12.) 8² + 5² -6² =
64 + 25 - 36
53 13 -20 soal ny gak di buat
13,) 225 - 81 + 9
144 + 9
253
14.) 169 + 100 - 9
269 - 9
260
15.) 64 - 16 + 49
48 + 49 = 97
16.) 225 x 100 : 9
22500 : 9 = 2500
17.) 625 -144 - 169
312
18,) 100 x 9 + 25 - 121
804
19. ) 625
_____ = 25
25
20.) -