kolejnośc wykonywania działań
oblicz:
a)13x55-13x45=(.....-.....)=13x....=......
b)56x92+56x8=56x(......+.....)=56x.....=.....
c)23x25+23x75=.....x(......+......)=.....x.....=.....
d)63:7-35:7=(.....-.....):.....=.....:.....=......
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a)13x55 - 13x45 = 13x(55-45) = 13x10 = 130
b)56x92 + 56x8 = 56x(92+8) = 56x100 = 5600
c)23x25 + 23x75 = 23x(25+75) = 23x100 = 2300
d)63:7-35:7 = (63-35):7 = 28 : 7 = 4