Răspuns :

Mihaelavespeid

328+a=605

a=605-328

277

Răspuns:

• 328+a=605

a=605-328

a=277

• 3×b=318

b=318÷3

b=106

• c-169=255

c=255+169

c=424

• d÷7=123

d=123×7

d=861

• 845÷5+62×4=

169+248=417

• (100×4-205)÷5+9×10=

(400-205)÷5+90=

195÷5+90=

39+90=129

• 1000-(367-31×10+9×10)=

1000-(367-310+90)=

1000-(57+90)=

1000-147=853

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