1.Раскройте скобки:
(-3,1х+7,8у-9,6)*0,1
И 2
(0,7х-0,6у+0,5z)*(-1,5р)
2.Раскройте скобки и найдите значения выражения:
-6,19+(-1,5+5,19)
-(-21,4+12,7)+(-20,4+12,7)
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