2-3: Use Models to Add and Subtract Decimals: Quick Check
by Lindsay Bellino
| 5 Questions
Use the grids to find 1.48 - 0.83
Use the grid to find 0.55 + 0.29.
Which explains whether the sum of 0.52 + 0.61 is less than or greater than one?
A The sum is less than one because both decimals are less than one.
B The sum is less than one because the sum does not completely shade one hundredths grid.
C The sum is greater than one because the sum shades more than one hundredths grid.
D The sum is greater than one because any two decimals to the hundredths added together is greater than one.
Which equation does the following grid represent?
A 0.92 – 0.19 = 0.73
B 0.73 + 0.19 = 0.92
C 1.00 – 0.19 = 0.81
D 1.00 + 0.73 = 1.73
Each shaded area in the grids below represents a decimal.
Which explains how to find the sum of the decimals?
A Count 40 shaded squares, or 0.40, on the first grid and 80 shaded squares, or 0.80, on the second grid. Then add them together to get 1.20.
B Count 44 shaded squares, or 0.44, on the first grid and 87 shaded squares, or 0.87, on the second grid. Then add them together to get 1.31.
C Count 56 shaded squares, or 0.56, on the first grid and 13 shaded squares, or 0.13, on the second grid. Then add them together to get 0.69.
D Count a total of 100 squares, or 1.00, on the left grid and 100 squares, or 1.00, on the right grid. Then add them together to get 2.00.
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