Modeling Multiplication of Decimals with Base Ten Blocks

First, what let’s decide what 1 whole will look like… Let’s choose the flat for today.

It’s 1 unit wide and 1 unit long. 1 x 1 = 1

One tenth of the flat is a rod.

The rod is one unit long by a tenth wide. 0.1 1 1 x 0.1 = 0.1

One tenth of the rod is the unit cube.

One tenth of the rod is the unit cube.

one hundredth 0.1 0.1 0.01 0.1 x 0.1 = 0.01

Let’s model 1.2 x 2.3 Width of 1 whole and two tenths Fill in Width of 1 whole and two tenths Length of 2 whole and three tenths

Let’s model 1.2 x 2.3 = 2. 76 Fill in Product  2 whole, 7 tenths, 6 hundredths  2.76

Let’s model 1.3 x 0.7 Width of seven tenths Fill in.... Length of 1 whole and three tenths

Let’s model 1.3 x 0.7 0.91 = 0.91 Product 7 tenths +21 hundredths Fill in.... Product 7 tenths +21 hundredths 0.91