Dividing Decimals By Whole Numbers CONFIDENTIAL

LET’S CHECK !!! 0.7 x 0.4 =0.28 21 ÷ 3 = 7 81÷ 9 =9 63 ÷ 7 =9 729 ÷ 81 =9 CONFIDENTIAL

Divide a decimal by a 1-digit number Divide a decimal by a whole number is similar to dividing whole numbers CONFIDENTIAL

Dividing decimals by a 1-digit number Example-1 Find 6.8 ÷ 2 = Estimate 6 ÷ 2 = 3 3.4 Place the decimal point directly above the decimal point in the dividend. 6.8 -6.0 0 8 8 Divide as with whole numbers 6.8 ÷ 2 = 3.4. Compared to the estimate, the quotient is reasonable. CONFIDENTIAL

Example -2 45.9 1 5. 3 - 3 15 - 15 0 9 -9 Estimate 48 ÷ 3 = 16. Divide 45.9 ÷ 3 Place the decimal point 45.9 - 3 15 - 15 0 9 -9 1 5. 3 Divide as with whole numbers 45.9 ÷ 3 = 15.3. Compared to estimate, quotient is reasonable. CONFIDENTIAL

Example-3 Find 3.49 ÷ 4 Estimate is 4 ÷4 =1 Place the decimal point 0. 8 7 2 5 4 3.4900 - 32 29 -28 10 -8 20 -20 Annex a zero and continue dividing. 3.49 ÷ 4 = 0.8725. Compared to the estimate, the quotient is reasonable. CONFIDENTIAL

Let’s try by yourself 2.5 3 7.5 -6 15 -15 Find 7.5 ÷ 3 CONFIDENTIAL

Multiplying Decimals By a 2-Digit Number Find 7.49 ÷ 14 0.535 Place the decimal point Estimate is 10 ÷10=1 7.490 -70 0 49 - 42 070 - 70 7.49 ÷14 = 0.535. Compared to the estimate, the quotient is reasonable. Annex a zero and continue dividing CONFIDENTIAL

Example -2 Place the decimal point 0.395 Find 8.69 ÷ 22. 22 8.690 -66 209 -198 0110 -110 Annex a zero and continue dividing. CONFIDENTIAL

Now your turn Find 114.8 ÷ 14 = 8.2 CONFIDENTIAL

Practice Problems 2) 9.6 ÷2 = 4.8 1) 3.5 ÷ 7=0.5 3) 51.79÷3=17.2633 CONFIDENTIAL

More Problems 1) 11.4 ÷ 19=0.6 2) 10.22 ÷ 14=0.73 3) 212.8 ÷ 14=15.2 CONFIDENTIAL

Have a Break!!! CONFIDENTIAL

Let’s have some fun http://www.thekidzpage.com/onlinejigsawpuzzles/jigsaw-puzzles/12-piece-jigsaw/010406flamingo.html CONFIDENTIAL

More Practice Problems 1) 39.39 ÷ 3=13.13 5) 55.2 ÷ 46= 1.2 2) 8.53 ÷ 6=1.421666 6) 336.75 ÷ 31=10.862 3) 36.8 ÷ 2= 18.4 7) 751.2 ÷ 25=30.048 8) 69.904 ÷ 34=2.056 4) 118.5 ÷ 5= 23.7 CONFIDENTIAL

Word Problems Q: Britannia and 5 of her friends bought a six-pack of fruit juice after their lacrosse game. If the six-pack costs $3.29, how much does each person owe, if the cost is divided equally ? A:$3.29÷6 = 0.5483333………… CONFIDENTIAL

Review ♣ Dividing a decimal by a whole number is similar to dividing whole numbers. CONFIDENTIAL

That's all for today. We will meet soon. CONFIDENTIAL