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Calculati in doua moduri:
a) (17+23+9)×100=
(85-30-15)×43=

b). 18×4×3×25=
125×7×8×10=

c). (228+196+308)÷7=
(856-352-490)÷8=

d). 25×428+172×25=
34×11-27×11=
945÷7+525÷7=

Va rog dau coronita si 20 pc