learning step by step

  1. INICIO
  2. SOY ALUMNO
  3. FOURTH

  • 1

    FIRST STEPS

  • NEW

    P4-1

    PROBLEMS

  • 5 + 3 + 2

    MENTAL ARITHMETICS: SUMS OF 3 ADDENDS

  • 71 + 40

    MENTAL ARITHMETICS: SUMS OF 2 DIGITS

  • 88 - 5

    MENTAL ARITHMETICS: SUBTRACTIONS

  • 9 x 7

    MENTAL ARITHMETICS: MULTIPLICATION TABLES

  • 57 x 4

    MENTAL ARITHMETICS: MULTIPLICATIONS

  • 565045 + 349978 + 47950

    SUMS: 3 ADDENDS OF 6 DIGITS

  • 43565 + 76349 + 89479 + 4567 + 12900

    SUMS: 5 ADDENDS OF 5 DIGITS

  • 45650 - 13499

    SUBTRACTIONS OF 5 DIGITS

  • 4817088 - 776487

    SUBTRACTIONS OF 7 DIGITS

  • 595 x 8

    SHORT MULTIPLICATIONS BY 1 DIGIT

  • 7538670 x 3

    LONG MULTIPLICATIONS BY 1 DIGIT

  • 3721 x 54

    MULTIPLICATIONS BY 2 DIGITS