Multiplying by Multiples of 10 and 100 Multiplicando por Múltiplos De 10 y 100

What strategies can you use to multiply by tens? Chapter 3 – lesson 3.1- Pg.101 What strategies can you use to multiply by tens?

Review Multiplication Words Multiple- the product of a given whole number and any other number. Múltiple el producto de un número entero dado y cualquier otro número Factors- numbers you multiply together to obtain a product. Números factores- multiplicas juntos para obtener un producto. Product- the answer to a multiplication problem. Producto- la respuesta a un problema de multiplicación. ex: 5 x 6 = 30 factors product

Multiplication Patterns 3 x 20 = 3 x 200 = 60 However many zeros are in the problem, is how many should be in your answer! Solve the simpler problem! What’s the pattern? 600

Multiplication Patterns 40 x 6 = 400 x 6 = 4000 x 6 = 240 2,400 24,000

Multiplication Patterns 6 x 5 = 6 x 50 = 6 x 500 = However many zeros are in the problem, is how many should be in your answer!... except when a zero is used in your simpler problem!! 30 300 3,000

Multiplication Patterns 7 x 40 = _____ 7 x 400 = _____ 3 x 1 = _____ 3 x 10 = _____ 3 x 100 = _____ 5 x 8 = _____ 5 x 80 = _____ 5 x 800 = _____

Multiplication Patterns 7 x 40 = 280 7 x 400 = 2800 3 x 1 = 3 3 x 10 = 30 3 x 100 = 300 5 x 8 = 40 5 x 80 = 400 5 x 800 = 4000

Now You Try! On your own: 1) 8 x 40 = 2) 9 x 200 = 3) 4 x 300 = 4) 70x5 = 5) 17x30= 6) 12x90=

Check your answers! 1) 8 x 40 = 320 4) 70x5 = 350 2) 9 x 200 = 1800 5) 17x30= 510 3) 4 x 300 = 1200 6)12x90= 1080

Chapter 3 – lesson 3.1- Pg.101 What strategies can you use to multiply by tens? I can use place value, the Associate Property, a number line, and mental math.

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