LESSON 7 SESSION 2
Develop Using the Standard Algorithm
to Add and Subtract Decimals
Read and try to solve the problem below.
How much greater is the mass of a dollar coin than the combined
masses of a dime and a quarter?
TRY
IT
put
Math Toolkit base-ten blocks, base-ten grid paper,
grid paper, number lines, place-value charts
Mass of U.S. Coins
Periny: 2.5 g
Dime: 2.268 g
Nicket: 5. g
Quarter: 5.67 g
Half-Dollar: 11.34 g Dollar 8.1 g