https://www.topmarks.co.uk/maths-games/hit-the-button Hit the Button, number bonds, halving, doubling, times tables, square numbers

http://www.sums.co.uk/original/
(EY/KS1) Unit 1 Easy – How many / Counting, counting up to 10 or 20
(EY/KS1) Unit 2 Easy – Word game, find words that spell a number (20-100)
(EY/KS1) Unit 2 Easy – Square Detective, find numbers in a hundred square
Number 5/6 – Golden digits, read numbers written as words (up to 9,999)

Sequences
http://www.sums.co.uk/original/
Number 3/4 – euro train, recognise multiples of 2,5,10,50
Number 3/4 – snake sequences, find missing numbers in sequences (EY/KS1 )Unit 1 Easy - Silly Sequence, find next number in a sequence (counting in 1s, 2s,3s, 5s)

Odd/even
http://www.sums.co.uk/original/
Number 3/4 – odd socks, match the number of pairs to total number of socks (EY/KS1 ) Unit 1 Easy – Odds and Evens, find odd and even numbers up to 10 or 20

Number bonds
http://www.primaryhomeworkhelp.co.uk/maths/numberskills.html
https://www.topmarks.co.uk/maths-games/hit-the-button
http://www.sums.co.uk/original/
(EY/KS1 ) Unit 2 Easy – card games, number bonds to 10

Ordering numbers
http://www.sums.co.uk/original/
Number 5/6 – fishy numbers, ordering numbers up to 999,999 Number 5/6 – roll over, using >< to compare numbers and calculations

Ordering decimals 2dp LKS2 http://www.bbc.co.uk/schools/teachers/ks2_activities/maths/decimals.shtml

Ordering fractions LKS2 http://www.bbc.co.uk/schools/teachers/ks2_activities/maths/fractions.shtml

Decimal place value http://www.math-play.com/football-math-decimals-place-value/football-math-decimals-place-value.html

Rounding
http://www.sums.co.uk/original/
Number 3/4 – hedgehog catch, to nearest 10, 100
Number 3/4 – euro notes, using smallest number of notes to pay bills, also identifying euro notes (!)

Rounding decimals to 3 decimal places UKS2 http://www.math-play.com/baseball-math-rounding-decimals/rounding-decimals-baseball-game_html5.html

Rounding decimals to nearest whole number LKS2 http://www.math-play.com/rounding-decimals-game-1/rounding-decimals-soccer-game.html

Multiplying and dividing by 10, 100, 1000
http://kids.britannica.com/lm/games/GM_5_5/GM_5_5.htm
https://www.mangahigh.com/en-gb/maths_games/number/decimals/multiply_and_divide_decimals_by_10,_100,_1000
http://www.topmarks.co.uk/maths-games/7-11-years/place-value
http://www.snappymaths.com/multiplication/multby10or100/interactive/multby10imm/multby10imm.htm
http://www.mathsrevision.com/index_files/Maths/Presentations/S2_Presentations/S1_Presentations/S1_TTT_10_100_100.html
http://www.sums.co.uk/original/
Number 5/6 – wriggly places