Mental Math Mastery
A Grade 7 math worksheet focused on developing mental calculation skills through various exercises including addition, subtraction, multiplication, and division.
Includes
Standards
Topics
Mental Math Mastery
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Date:
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Read each question carefully and solve it using mental math. Try to avoid using a calculator or writing down intermediate steps. Write your final answer in the space provided.
1. Calculate: 345 + 199 =
2. Calculate: 572 - 298 =
3. Calculate: 800 - 157 =
4. Calculate: 1250 + 375 =
5. What is 15 multiplied by 8?
100
120
150
180
6. What is 25 multiplied by 12?
200
250
300
350
7. Divide 144 by 6. What is the quotient?
8. If you share 210 marbles equally among 7 friends, how many marbles does each friend get?
9. To multiply a number by 50, you can multiply by 100 and then divide by 2.
True
False
10. When adding 9 to a number, it's often easier to add 10 and then subtract 1.
True
False
11. Use the number line to show the sum of 5 and -8. What is the result?
Use the words below to complete the sentences.
12. To mentally calculate 27 + 38, you can add 30 to 27, then subtract 2. This strategy is called .
13. The property helps to multiply 8 x 17 by calculating (8 x 10) + (8 x 7).