Answer:
0.421
Step-by-step explanation:
There are two diagrams, one for 0.137, and one for 0.284.
I'll go place by place from least to greatest.
First, add 7 thousandths and 4 thousandths.
That will equal 11 thousands. That's greater than 9, so add 1 hundredth to the equation.
(0.1 + 0.2) + (0.03 + 0.08 + 0.01) + 0.001
Now, add 3 hundredths and 8 hundredths.
That will equal 11 hundredths. Add the other hundredth from the regrouping of the thousands for 12 hundredths. That is also greater than 9, so add 1 tenth to the quation
(0.1 + 0.2 + 0.1) + 0.02 + 0.001
Then, add 1 tenth and 2 tenths.
That will equal 3 tenths. Add the other tenth from the regrouping of the hundredths to get 4 tenths.
0.4 + 0.02 + 0.001
Now add 0.4, 0.02, and 0.001.
0.42 + 0.001
0.421
The answer to 0.137 + 0.284 equals 0.421.
