Short Blocks

Maths Year 2 Summer Number

Each unit has everything you need to teach a set of related skills and concepts.

2- & 3-digit numbers on line; round to 10 (suggested as 3 days)

Planning and Activities

Day 1 Teaching
Draw a line from 0–100 with only 0 and 100 land no other marks. Where can we mark 47? Discuss how it is helpful to mark 50. Then discuss how to place other numbers and agree that marking all multiples of 10 is helpful to locate other numbers. Then play ‘guess my number’ with two children forming the ends of the 0–100 line.
Group Activities
-- Sketch number lines; estimate the position of 2-digit numbers between 0 and 100 as accurately as possible.
-- Estimate the value of mystery numbers on a 0–100 sketched line by considering nearby 10s.

Day 2 Teaching
Display 0–10 number line (see resources), point to 3 and ask: Is this closer to 0 or 10? Repeat for other numbers. Explain that we call this ‘rounding to nearest ten’. Spend time talking about 5, explaining that, although it is in the middle, we always round up to the 10 above. Repeat for numbers between 30 and 40, to include 35.
Group Activities
Use the in-depth problem-solving investigation ‘Which scripts?’ from NRICH as today’s group activity.
Or, use these activities:
-- Mark 2-digit numbers on a line; round to nearest 10. Create a poster to explain rounding.
-- Play ‘Rounding Pelmanism’.

Day 3 Teaching
Show a 101–200 square (see resources). Count from 101 to 200, pointing at the numbers and noting they follow the same patterns as 1 to 100. Show a 0–100 beaded line. How could we change this 0–100 beaded line to be a 100–200 beaded line? Amend 0 to 100, 100 to 200. What should we change 10 to? And 20? etc. Count in 10s from 100 to 200. Mark on various 3-digit numbers to 200.
Group Activities
-- Order 3-digit numbers between 100 and 200; locate on a beaded or landmarked line.
-- Place 3-digit numbers on a landmarked line.

You Will Need

  • Mini-whiteboards and pens
  • 1–9 digit cards
  • A4 book with 1cm squared paper
  • ‘0–100 landmarked line’ (see resources)
  • ‘0–10 landmarked line’ (see resources)
  • ‘30–40 landmarked line’ (see resources)
  • 1–9 dice
  • Additional activity sheets (see resources)
  • Sticky notes
  • ITP: Number Grid

Mental/Oral Maths Starters

Day 1
Mark 2-digit numbers on a landmarked line (pre-requisite skills)

Day 2
Round 2-digit numbers to the nearest 10 (pre-requisite skills)

Suggested for Day 3
Recognise multiples of 2 and 5 (simmering skills)

Worksheets

Day 1
Identify numbers indicated by arrows on a 0-100 beaded or landmarked line. Mark given numbers on the line.

Day 2
Round 2-digit numbers to the nearest 10.

Day 3
Identify numbers indicated by arrows on a 100-200 beaded or landmarked line. Mark given numbers on the line.

Mastery: Reasoning and Problem-Solving

  • Rewrite these numbers in order, smallest to largest.
    93
    121
    39
    189
    200
    75
    175
  • Fill in the missing numbers in these portions of the 101–200 grid: Diagram 1
153154

Diagram 2

174
  • Round each of these numbers to the nearest 10:
    71, 89, 124, 95, 147, 185

In-depth Investigation: Which Scripts?
There are six numbers written in five different scripts. Can children sort out which is which? Which Scripts? from nrich.maths.org.

Extra Support

Missing Beads
Placing numbers on a 0–100 landmarked line