Weds 23rd Nov – Dividing by 20, 200, 20000, 30, 300 and 3000

LEARNING OBJECTIVE: To use the skills in dividing by 10, 100 & 1000 to divide by 20, 200, 2000, 30, 300 & 3000

SUCCESS CRITERIA: You will be able to divide numbers by 20, 200, 2000, 30,300, 3000 without a calculator

STARTER: Write down the answers to the following:

12 ÷ 2 = 6 26 ÷ 2 = 13 12 ÷ 3 =4 24 ÷ 3 =8 90 ÷ 30 =3 800 ÷ 2 =400 600 ÷ 2 = 300 2460 ÷ 2 =1230 864 ÷ 2 =432 336 ÷ 3 =112

393 ÷ 3 = 131 9963 ÷ 3 = 3321 8642 ÷ 2 = 4321 6420 ÷ 2 = 3210 462 ÷ 3 = 154 252 ÷ 2 = 126 75 ÷ 2 = 37.5 64.2 ÷ 3 = 20.14 12.64 ÷ 2 = 6.32 2.31 ÷ 3 = 0.77

PLENARY: Check answers, get feedback from students on how well they have done

LESSON: DO lots of examples to show that dividing by 300 is like the two step process divide by 3, then divide by 100, and 200 divide by 2 then divide by 100....

Lots of examples on IWB

Have a go at Thee questions

12 ÷ 20 = 0.6 26 ÷ 20 = 0.13 12 ÷ 30 = 0.4 24 ÷ 30 = 0.8 90 ÷ 30 = 3 800 ÷ 20 = 20 600 ÷ 200 = 3 2460 ÷ 200 = 12.3 864 ÷ 2000 = 0.432 336 ÷ 30 = 11.2

393 ÷ 300 = 1.31 9963 ÷ 300 = 33.21 8642 ÷ 2000 = 4.321 6420 ÷ 200 = 32.1 462 ÷ 30 = 15.4 252 ÷ 2 = 126 75 ÷ 20 = 3.75 64.2 ÷ 30 = 2.14 12.64 ÷ 200 = 0.0632 2.31 ÷ 30 = 0.077

 

Get students to use a calculator to check their own answers

EXTENSION QUESTIONS

PLENARY: Checking answers around the classroom