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Calculati in doua moduri:
a) 50x(27+3)=? aratati calculul in cele 2 moduri
b) 14x49+71x 14=? aratati calculul in cele 2 moduri
c) 17x7+64x7+7x119=? aratati calculul in cele 2 moduri
d) 450x21+550x21-2100=? aratati calculul in cele 2 moduri
e) 736x17-236x17+200x17=? aratati calculul in cele 2 moduri
VA ROG DIN SUFLET AJUTATI-MA !!!


Răspuns :

a) 50x30=1500 sau 50x27+50x3=1350+150=1500
b) 14x(49+71)=14x120=1680 sau 686+994=1680
c) 7x(17+64+119)=7x200=1400 sau 119+448+833=1400
d) 21x(450+550-100)=21x900=18900 sau 9450+11550-2100=18900
e) 17x(736-236+200)=17x700=11900 sau 12512-4012+3400=11900