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on 25-Aug-2018 (Sat)

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Addition problems that involve carrying can often be turned into easy subtraction problems.

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Three-digit subtraction problems can often be turned into easy addition problems.

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Understanding complements helps in doing difficult subtraction.

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To find the complement of a 2-digit number, find the number that when added to the first digit will yield 9 and the number that when added to the second digit will yield 10.

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To find 3-digit complements, find the numbers that will yield 9, 9, 10 when added to each of the digits.

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When making change from $20, the idea is essentially the same, but the dollars add to 19 and the cents add to 100.

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As you practice mental addition and subtraction, remember to work one digit at a time and look for opportunities to use complements that turn hard addition problems into easy subtraction problems and vice versa.

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An example of a command STEEL = DEFI_MATERIAU (ELAS = _F ( E=205000.E6, NU=0.3 ) ) An other example IMPR_RESU( RESU = _F ( RESULTAT = RESU ) ) Data setting and command language (2/3) Name of the concept User choice Command Factor keyword Simple keyword Argument of the simple keyword No concept is produced Command Factor keyword Simple keyword Argument of the simple keyword

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Meshes in other formats Commands PRE_*** to convert to Aster format: PRE_GIBI, PRE_IDEAS, PRE_GMSH Example: PRE_***() mymesh = LIRE_MAILLAGE(FORMAT=‘ASTER’)

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