2. Understand the transitivity of the relationship between four numbers in 10.
3, can keep the material, can be restored after surgery.
Activity key activity difficult activity preparation experience preparation:
Material preparation: Teaching preparation: The order of numbers. The magnets of the ball card and the digital card are 1- 10 respectively.
Learning tools: multi-purpose plug-board, white magnetic board and backing paper 5 "The Order of Numbers". Ceramic tiles: 1- 10 two sets of rubber ball cards,1-/kloc-0 two sets of digital cards.
Teachers organize and guide activities. 1. Guide children to observe and understand the size order indicated by continuous greater than/less than numbers, arrange the ball group cards in sequence, and fill in the math cards to indicate the size order.
1, the scene introduction teacher shows the base paper 5 "Number Order" and the rubber ball group card 1- 10: "Mai Mai should pick out several rubber ball cards with different numbers and fill in the blanks in order (pointing to four boxes on the base paper). Are you willing to help her? " 2. The teacher pointed to three consecutive greater than signs on the bottom paper: "Look, Mai Mai drew three symbols of' big mouth fish', and each big mouth of' big mouth fish' is facing forward. (Imitate the size greater than the sign with both hands to help children understand) Guess what order Mai Mai should fill in the blanks of the ball card? Should we row from more to less or from less to more? (From multiple rows to fewer rows) Why? " 3. Model Rules Teacher: "Ok, now we have to learn to put the ball according to the tips of' big mouth fish'. Who wants to try? " Ask a child to randomly pick 4 rubber ball cards. Teacher: "How many balls are there on each card he picks?" Teacher: "Let's see how these three' big mouth fish' are arranged. How should the rubber ball cards be arranged (from large number to decimal number)? (From multiple rows to less) "Ask the children to discharge the ball group cards.