Adding Decimals
0.6 + 0.3 = ?
What is 0.9?
5.6 – 2.3 = ?
What is 3.3?
0.7 × 4 = ?
What is 2.8?
4 ÷ 2 = ?
What is 2?
The number of children Ms. Meray has.
What is 1?
True or False: When adding decimals, you must line up the decimal points.
What is True?
Subtract 7.1 – 3.25. Explain how to line up the numbers.
What is 3.85? (Line up decimal points and add a placeholder zero if needed: 7.10 - 3.25)
True or False: To determine the number of decimal places in the product, you add the number of decimal places in each factor.
What is True?
7.2 ÷ 3 = ?
What is 2.4?
Meray's favorite season of the year.
What is Fall?
Add 3.4 + 2.56. Be sure to explain how you lined up the numbers.
What is 5.96? (Line up decimal points and add a placeholder zero if needed: 3.40 + 2.56)
True or False: You can subtract decimals without lining up the decimal points as long as you know the place values.
What is False?
True or False: You line up decimal points when multiplying decimals.
What is False?
True or False: When dividing decimals, you can make the divisor a whole number by moving the decimal.
What is True?
The year Ms. Meray started teaching at MMS.
What is 2018?
Mia has $3.75 in her wallet. She finds $2.50 in her backpack. How much money does she have now?
What is $6.25?
Explain why 2.0 – 1.75 is the same as 2.00 – 1.75.
Adding a zero as a placeholder does not change the value; it makes lining up easier.
Multiply 0.6 × 0.7. Explain how you know where to put the decimal.
What is 0.42? (Count total decimal places: one in each factor = 2 decimal places in product)
0.81 liters of juice is shared equally among 9 friends. How much juice does each friend get?
What is 0.09 liters?
Ms. Meray's favorite place in the world.
What is Italy?
Without calculating exactly, which sum is larger: 0.45 + 0.3 or 0.4 + 0.35? Explain your reasoning.
They are equal. (Both sums are 0.75; this checks understanding of decimal addition without direct computation.)
A store had $12.50 in one register and $7.25 in another. How much more money is in the first register?
What is $5.25?
Multiply 3.2 × 0.05 and explain your reasoning about decimal placement.
What is 0.16? (3.2 has 1 decimal place, 0.05 has 2, so product has 3 decimal places)
A baker needs to divide 4.5 kg of flour into bags that each hold 0.15 kg. Explain how you can make the divisor a whole number and what you must do to the dividend. Then find the number of bags.
Multiply both the divisor and the dividend by 100 to make 0.15 → 15 and 4.5 → 450. Then divide 450 ÷ 15 = 30 bags.
The city where Ms. Meray was born.
What is Sterling Heights?