Jumping the number line – decimal fractions (hundredths)

Teacher’s Notes

These exercises and activities are for students to use independently of the teacher to practice number properties

Number Framework domain and stage:

Addition and subtraction, stage 7, advanced multiplicative

Curriculum Reference:

Number, level 4

Prior knowledge. Students should be able to:

During these activities, students will meet:

This may be done either using the number line or with written recording of identified ‘mental jumps’

Background

These exercises have been set up in the following way. Exercise 1: adding on from a whole number
Exercise 2: jumping up to a whole number and then adding on using three step method
Exercise 3: using two steps only – hundredths (between 0.01 and 0.09) added onto a tenths number
Exercise 4: using two steps only – hundredths (between 0.01 and 0.09) added onto a hundredths number
Exercise 5: using two steps only – hundredths (between 0.11 and 0.29) added onto a tenths number
Exercise 6: using two steps only – hundredths (between 0.11 and 0.29) added onto a hundredths number
Exercise 7: a mixture

Written recording

Written recording of mental strategies (that is, how you thought through the problem) is important for developing sound assessment skills as it allows others to follow your reasoning and allows you to have a visual check for accidental errors. It is also something that develops over time, and needs to be discussed regularly with students. Exercises 5, 6 and 7 stress that students should solve the problems mentally, but record enough to show what they have done. Discussing or eliciting different ways of doing this is therefore an important activity, which you may choose to run either before or after setting students to work on this exercise

Practice exercises with answers:

PDF (87KB) or Word (45KB)