Group the whole class into teams of two children each and assign a non-exact division for each couple. One student should be responsible for doing the division until coming up with a remainder and the second student must add a decimal point on the quotient, a zero on the remainder and finish the operation. Keep a timer and reward the fastest couple. Through this activity, students can realize that dividing the remainder is not rocket science, as the rules before and after the decimal mark remain the same.
This game is suitable for two players at a time. Form a game board consisting of 10 drawing blocks and ask students to roll two dice: their sum is the dividend. Rolling one die afterwards gives them the divisor. Students can either do the division until they reach the remainder (9/4=2 with 1 as a remainder), or continue the division (9/4=2.25). If a student chooses the first option, he can move two steps forward (the quotient's value), but also go one step backwards (the remainder's value). On the other hand, the student who put more effort to finish the division does not lose any blocks, while he can also earn a block if the quotient can be rounded up (2.5 becomes 3 for instance).
Divide the class into two teams. Give each team the same black and white picture, featuring non-exact divisions on each area (for example 18/8 on the boat's side, 21/6 on the sea and 45/8 on the sky) and ask students to solve the divisions without leaving a remainder. After successfully solving a division, the team can color the corresponding area of the picture. The first team to color the whole picture wins.
Distribute worksheets containing 10 step-by-step solved divisions, omitting the decimal mark on the quotient (for example 110/8=1375 and 360/80=45). Ask students to work as fast as they can to circle the remainder in the division (6 which become 60 on the first occasion and 40 becoming 400 on the second) and place the decimal mark on the correct position in the quotient (13.75, 4.5 for instance). Keep a timer and reward the fastest student with the least mistakes.