Lesson on Dividing No Decimals

Dividing Decimals

1-5 Springboard

Dividing Decimals

You can always start with estimation to determine if your answer makes sense.

If the divisor (number outside or number you divide by) does not contain a decimal just bring the decimal from the dividend (inside) up into the answer and divide as normal.

Multiple Choice

$$168.75\div25$$  

• 7.65

• 0.14

• 6.75

Multiple Choice

$$339.5\div7$$  

• 48.5

• 45.8

Dividing Decimals With a Decimal in the Divisor

You cannot have a decimal in the divisor (outside of the division box).

If you do you must move the decimal until it is at the end of the number and match the movement of the decimals inside and then bring it up in the answer (above the divsion box).

Multiple Choice

$$682\div0.31$$  

• 22

• 2,200

• 220

Homework

Use a scratch sheet of paper if you need. Remember you are doing on your own.

Multiple Choice

Imam makes bead bracelets. She can buy 12 beads for $2.04 or 17 beads for $3.57. Which deal gives her the lower cost for one bead? Explain.

• 12 beads for $2.04 is the better deal

• 7 beads for $3.57 is the better deal

Multiple Choice

Sam is saving $5.75 per week to buy a CD player that costs $46. How many weeks will he have to save before he can buy the player?

• 7 Weeks

• 8 Weeks

• 9 Weeks

Multiple Choice

A 17.5-kilometer racecourse is divided into 2.5-kilometer portions. How many portions are there in the complete course?

• 7 Portions

• 8 Portions

• 9 Portions