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Grade 4 Math — Knowing our numbers

Compare, order, round and estimate with numbers of four digits and more.

Name: ________________________

Before you start

Move between four thousand and five thousand, a hundred at a time. Watch which end of the line you are nearer.

400045005000

Halfway is 4500. Everything to the left of it is nearer 4000 and everything to the right is nearer 5000 — which is the whole of rounding to the nearest thousand, and why 4783 goes up rather than down.

  1. 1.Estimate 297 + 405 by rounding each number to the nearest hundred, then tap the estimate.

    Mark the line with an X.

    4005006007008009001000

  2. 2.Sort each number by whether it is closer to 5000 or to 6000.

    Groups: Closer to 5000 · Closer to 6000

    • 5045
    • 5890
    • 5120
    • 5499
    • 5750
    • 5501

  3. 3.Match each number to what it becomes when it is rounded to the nearest ten.

    • 4623
    • 4627
    • 4638
    • 4611
    • 4646
    • 4650
    • 4610
    • 4640
    • 4630
    • 4620

  4. 4.What is the successor of 78999?

  5. 5.Which of these is the smallest number?

    • a) 30909
    • b) 30990
    • c) 30099
    • d) 39009

  6. 6.Make the smallest number you can from the digits 5, 2, 8 and 6, using each digit once.

  7. 7.Round 4678 to the nearest hundred.

  8. 8.Which of these is the largest number?

    • a) 46587
    • b) 46785
    • c) 46875
    • d) 46857

Answer key — Grade 4 Math — Knowing our numbers

  1. 1. 700
  2. 2. 5120 → Closer to 5000; 5890 → Closer to 6000; 5499 → Closer to 5000; 5501 → Closer to 6000; 5045 → Closer to 5000; 5750 → Closer to 6000
  3. 3. 4623 → 4620; 4627 → 4630; 4638 → 4640; 4611 → 4610; 4646 → 4650
  4. 4. 79000
  5. 5. c) 30099
  6. 6. 2568
  7. 7. 4700
  8. 8. c) 46875