on 25-Aug-2018 (Sat)

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

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

Understanding complements helps in doing difficult subtraction.

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.

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

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

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.

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

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