X0101 EFFECT 33 LIVE 2010-04-01 0000924211-10-000023 485APOS 0000924211 AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS INC 033-79482 S000005931 STRATEGIC ALLOCATION: AGGRESSIVE FUND C000016318 R CLASS S000005931 STRATEGIC ALLOCATION: AGGRESSIVE FUND C000016319 INVESTOR CLASS S000005931 STRATEGIC ALLOCATION: AGGRESSIVE FUND C000016320 A CLASS S000005931 STRATEGIC ALLOCATION: AGGRESSIVE FUND C000016321 INSTITUTIONAL CLASS S000005931 STRATEGIC ALLOCATION: AGGRESSIVE FUND C000016323 B CLASS S000005931 STRATEGIC ALLOCATION: AGGRESSIVE FUND C000016324 C CLASS S000005932 STRATEGIC ALLOCATION: MODERATE FUND C000016325 INVESTOR CLASS S000005932 STRATEGIC ALLOCATION: MODERATE FUND C000016326 A CLASS S000005932 STRATEGIC ALLOCATION: MODERATE FUND C000016327 INSTITUTIONAL CLASS S000005932 STRATEGIC ALLOCATION: MODERATE FUND C000016329 B CLASS S000005932 STRATEGIC ALLOCATION: MODERATE FUND C000016330 C CLASS S000005932 STRATEGIC ALLOCATION: MODERATE FUND C000016331 R CLASS S000005933 STRATEGIC ALLOCATION: CONSERVATIVE FUND C000016332 R CLASS S000005933 STRATEGIC ALLOCATION: CONSERVATIVE FUND C000016333 INVESTOR CLASS S000005933 STRATEGIC ALLOCATION: CONSERVATIVE FUND C000016334 A CLASS S000005933 STRATEGIC ALLOCATION: CONSERVATIVE FUND C000016335 INSTITUTIONAL CLASS S000005933 STRATEGIC ALLOCATION: CONSERVATIVE FUND C000016337 B CLASS S000005933 STRATEGIC ALLOCATION: CONSERVATIVE FUND C000016338 C CLASS