Open a Ten!

Grade 2 · Place value · regroup and un-group
Transdisciplinary theme
Who we are — Me, My Family and Friends
Central idea
Family and friends help a person grow, learn the rules of life and understand themselves.
Key concept
FORM — a number is made of groups, just like a family is made of people
Learner profile
Thinker · Communicator · Risk-taker · Reflective

The rule of the game

10 ones⇄ 1 ten · 10 tens⇄ 1 hundred

The number stays the same — only its form changes. Tap a ten, or use the buttons: open a ten into 10 ones, open a hundred into 10 tens, or close them back. Число не меняется — меняется только его форма. Нажми на десяток, чтобы открыть его. Сан өзгермейді — тек түрі өзгереді. Ондықты ашу үшін оны бас.

hundredtenone

Who is playing?

Choose a level. Finish A, B and C first — D and E are bonus ★