Addition Equations To solve an equation means to find a value for the variable that makes the equation true. Whatever you do to one side of the equation, you must also do to the other side. Solving an equation is like solving a puzzle! It means finding a value for the variable that makes the [&he.....

### Mathematic

### Four Basic Operations of Mathematics

Four Basic Operations of Mathematics: Addition, Subtraction, Multiplication and Division The practice section of this page contains addition, subtraction, multiplication and division problems. Refer to the appropriate lesson if you find that you need extra practice or explanation for any of thes.....

### Place Values of Adding – Expanded Form

### How to Estimate Sum of Decimals by Rounding?

### Estimate of a Sum by Rounding

Improving an Estimate of a sum by rounding Estimation usually requires rounding. When you round a number, you find a new number that’s close to the original one. A rounded number uses zeros for some of the place values. If you round to the nearest ten, you will have a zero in the ones place. [&.....

### How to add Minutes and Seconds?

Addition of Minutes and Seconds In general, summing or subtracting time will get the time format such as hh:mm:ss, but in some cases, you just want to sum or subtract time to get hours or minutes or seconds only, how can you quickly handle it. Add the minutes together. Add the seconds together. I.....

### How to Change Hours and Minutes to Seconds?

Changing Hours and Minutes to Seconds Add or Subtract the hours and minutes separately. But you may need to do some adjusting if the minutes end up 60 or more, or less than zero! How to find the number of minutes if hours and minutes are known: Multiply the number of hours by 60. Add […]Read More »

### How to Add Pounds and Ounces?

Adding Pounds and Ounces Add the ounces together. If the number of ounces is greater than 16, divide the ounces by 16. The quotient is the number of pounds that need to be added to the other pounds. The remainder is the number of extra ounces. Add the original pounds plus the whole pounds resulti.....

### How to Subtract Feet and Inches?

Subtracting Feet and Inches Handles operations for feet whole numbers and inches in mixed numbers for adding, subtracting, dividing or multiplying whole numbers, fractions or mixed numbers and returns an answer in a reduced fraction and a mixed number, if it exists. When you begin learning about .....

### Addition of Decimals

Addition of Decimals Decimals are fractional numbers. The decimal 0.3 is the same as the fraction 3/10. The number 0.78 is a decimal that represents 78/100. Adding Decimals is just like adding other numbers. Always line up the decimal points when adding decimals. Remember to put the decimal point.....

### Multiplying by Repeated Addition

Multiplying by Repeated Addition Multiplication is defined as meaning that you have a certain number of groups of the same size. Then, it can be solved by repeated addition. The result of multiplication is the total number (product) that would be obtained by combining several (multiplier) groups .....