Number sense

Practise this line

1. 1Place valueWhich digit is in which place, and what is it then worth.
   • Value of a digit
   • Building numbers
   • Value of a digit: large numbers
   • Value of a digit after the decimal
   Explanation: Each digit has its place · Big numbers in pieces · After the decimal: tenths, hundredths, thousandthsFrom year 4 · 52
2. 2Numbers reading and writingFrom words to digits, and from digits to words.
   • Numbers into digits
   • Numbers into words
   Explanation: Big numbers in pieces · Hundreds first, then ‘and’, then the tens and onesFrom year 4 · 31
3. 3The number lineReading where the arrow points, and marking a number on the line yourself.
   • Reading the number line
   • Marking on the number line
   Explanation: What is one small mark worth? · First find the number before itFrom year 4 · 21
4. 4Dot problems and missing-number problemsFinding the missing number under the dot with plus, minus and times.
   • Dot problems with plus
   • Dot problems with minus
   • Dot problems with times
   Explanation: Calculate back from the answer · Find the difference or add · Divide the answer by the known numberFrom year 4 · 36
5. 5RoundingTo ten, hundred and thousand, and to decimal places.
   • Rounding to ten, hundred, thousand
   • Rounding to decimal places
   Explanation: Look at the digit to the right of it · Look at the next digitFrom year 6 · 27
6. 6Order and negative numbersWhich operation first, and calculating past zero.
   • Order of operations
   • Negative numbers: plus and minus
   • Negative numbers: times and divide
   Explanation: Brackets, powers, times and divide, then plus and minus · Move along the number line · Two of the same signs is plusFrom year 8 · 38
7. 7Divisibility and prime numbersDivisibility rules and numbers with exactly two divisors.
   • Divisibility rules
   • Prime numbers to 100
   Explanation: Handy divisibility rules · Only divisible by 1 and itselfFrom year 8 · 27