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Adding decimals with hundredths, part 2
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2. Find the missing numbers.
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3. Now add and subtract both!
[available in the ebook]
4. Figure out what was done in each step - either addition or subtraction!
[available in the ebook]
5. Add the decimals mentally. Pay close attention to the number that only has tenths. If it makes adding easier, tag a zero to it so the addends will have the same amount of decimals. You can think of the number line if it helps.
| a. | d. |
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0.04 + 0.1 =
0.14 + 0.1 = 0.3 + 0.05 = 2 + 0.1 =3 + 0.08 = |
13.53 + 0.4 =
5.03 + 2.25 = 1.3 + 6.02 = 7.03 + 0.2 =1.03 + 0.6 = |
6. Subtract mentally. Pay close attention to when the number only has tenths. Tag a zero to it so the addends will have the same amount of decimals.
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a. 0.4 − 0.06 =
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k. 0.44 − 0.1 =
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b. 0.6 − 0.05 =
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l. 1.32 − 0.02 =
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e. 0.3 − 0.15 =
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o. 1.77 − 0.3 =
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7. Write the following addition/subtraction sentences using decimal numbers, and solve.
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Next lesson: Multiplying decimals with hundredths. Money problems.
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The ideas in this decimals lesson are taken from Math Mammoth Decimals 1 book ($4.00 download). Only a few examples of each problem type are shown. |
The fast, FUN, and easy way to learn multiplication. Learn the upper times tales in two sittings using mnemonic stories.
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