1) (х + 512) - 403 = 509 2) 803 - (352 + у) = 413
х + 512 = 509 + 403 352 + у = 803 - 413
х + 512 = 912 352 + у = 390
х = 912 - 512 у = 390 - 352
х = 400 у = 38
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3) (201 - х) + 633 = 750 4) 721 + 189 = (910 - b)
201 - х = 750 - 633 910 - b = 910
201 - х = 117 b = 910 - 910
х = 201 - 117 b = 0
х = 84
1)(1,35-1/4)*5+20,8:8=1.35-0.25=1.1*5=5.5+2.6=8,1
2)(46,81+32,15)*14-3,4*5,6=1105,44-19,04=1086,4
25*(6318+3682)=10000*25=25000
1)<span>67,2:8=8.4
2)</span><span>22,23:9=2.47
</span><span>3) 86,5:25= 3.46
</span><span>4) 4,34:7= 0.62
</span><span>5) 17:4=4.25
</span><span>6) 2:5=0.4
</span><span>7)0,1216:19= 0.0064
</span><span>8)28,98:14=2.07</span>