How Ironing Board Mechanisms Work

Addition, Subtraction, Multiplication and Division

CARRERAS ADDITION AND SUBTRACTION

commutative property of SUMA

MULTIPLICATION OF 3 FIGURES

PROPERTIES Multiplication and division

ESTIMATION, APPROXIMATION AND MENTAL CALCULATION

PROBLEMS IN MULTIPLICATION AND DIVISION

ESTIMATION, APPROXIMATION CALCULATION

MENTAL ADDITION AND SUBTRACTION PROBLEMS

AUTOMATION multiplication and division

DIVISION FOR 2 FIGURES

DIVISION OF 3 FIGURES

TEST 9

GUESS THE NUMBER!