4年级数学计算题(Year 4 Math Calculation Exercise)

Year 4 Math Calculation Exercise

As a Year 4 student, math can seem quite daunting. However, with regular practice and exercises, anyone can become a math expert. In this article, we will explore some Year 4 math calculation exercises to help improve your math skills.

Addition

Addition is essential in math and is used in many everyday scenarios. Addition can be quite easy if you start with smaller numbers. For example, adding 2 3 is equal to 5. However, it can be more challenging when dealing with larger numbers. For instance, what is the sum of 847 and 491? Start with the ones column, which is 7 1, giving you 8. Then, move to the tens column, which is 4 9, giving you 13. Write down the 3 in the tens column and carry the 1 to the hundreds column. Finally, add the hundreds column, giving you a sum of 1,338.

Subtraction

Subtraction is the opposite of addition and can be just as important. To subtract, start with larger numbers, with the top number being the minuend and the bottom one being the subtrahend. For example, what is 456 - 128? Start with the ones column, which is 6 - 8. You can't subtract 8 from 6, so you borrow 1 from the tens column, making the ones column 16 - 8, giving you 8. Then move to the tens column, which is 5 - 2, giving you 3. Finally, subtract the hundreds column, giving you an answer of 328.

Multiplication

Multiplication involves working out the result of adding the same number repeatedly. For example, what is the product of 8 and 7? First, multiply the ones column, giving you 56. Write down the 6 in the ones column and carry 5 over to the tens column. Then, multiply the tens column, giving you 40. Add the carried over 5 to get 45. Write down the 5 in the tens column and carry the 4 over to the hundreds column. Finally, multiply the hundreds column, giving you 32. Add the carried over 4 to get 36. Therefore, the answer is 56 450 3,600 = 4,106.

Division

Division helps us divide larger numbers into smaller ones. For example, what is the quotient of 15 divided by 3? The answer is 5. In a more complex problem, what is the quotient of 132 divided by 11? Start with the tens column, which is impossible, so move to the hundreds column. The largest multiple of 11 that is less than 132 is 11 x 10 = 110. Therefore, the first digit in the quotient, which is 1, is written above the hundreds column. Subtract 110 from 132, giving you a remainder of 22. Repeat the process with the tens column, finding that there is one multiple of 11 that can be subtracted. Write 1 above the tens column. Subtract 11, giving you a remainder of 11. Finally, there is one multiple of 11 that can be subtracted from 11, which is 1. Write 1 above the ones column, and the answer is 12.

Conclusion

In conclusion, math can be challenging but enjoyable if you practice regularly. With these Year 4 math calculation exercises, you can improve your math skills and become more confident in your abilities. Remember to keep practicing, and don't be afraid to ask for help if you get stuck. With time and effort, you can become a math whiz!