Explain that division reduces a number. So the first check of accuracy is that the answer must be smaller than the number divided. Knowing the times table makes the work easier.
Clarify that division is the process of determining how many times one number can fit into another number. Take a bowl and put six marbles in it. Count out four marbles. Explain that you can take four marbles from six, so the number six contains the number four. Put the marbles back. Now say that you are going to take seven marbles. Count out the six marbles. Tip over the bowl to show that it is empty. You cannot take seven marbles out of six. A smaller number does not contain a larger number.
Revise place values. Make boxes of 10 blocks each, and have loose blocks handy. Tell your students to give you the number of blocks that you call out. For example, you call for 50 blocks. If they go to the single blocks, point out that there are boxes with 10 blocks each. Ask if taking five boxes will make 50. Then ask for 55 blocks. They have already counted to 50 blocks. Add five single blocks to make 55.
Divide. For example, take the number 84 divided by 4.
Multiply the divisor by the possible answer. How many times does the number eight contain the number four without going over? Two times. Multiply four by two to get eight. Write two on top of the division sign line.
Subtract the product from the dividend. So write the product under the dividend. Eight minus eight is zero.
Repeat. Bring down the next number to the right of the result of the subtraction. So write four to the right of the zero. Repeat steps one to three until all the numbers of the dividend have been worked, and you end up either with no remainder or a remainder smaller than the divisor.
Check for accuracy by multiplying the quotient (answer) by the divisor. You should get the original dividend.