Today we did quite a bit of work with our Abaci.
We learned how to represent multi digit numbers, and how to do simple addition with an abacus.
Essentially the abacus works by representing each place value as a rung. The beads on the bottom row we will think of as ones, the second row as tens, and so on. We may adjust this later for some more complex problems, but for now the simple whole number place values will suffice.
Tonight students have some addition problems that they should do on their abacus. They should then write down the process they used to solve the problems on the abacus. This is all detailed on the worksheet they received:
using-your-abacus
We did the first page together:
firstpage
Please remember that tomorrow we have a test. This test covers more base 10 things, such as using powers of ten and expanded forms. There will also be a question or two asking you to convert/figure out a base. Finally there will be 4 questions that ask you to use your abacus to perform arithmetic.
Much of the test looks like this:
base10review
And here are the answers to check:
base10reviewanswers
Have a good one,
-Mr. Potter