みんなで算数２年２

『みんなで算数』小学校２年向けの第２巻です。
「たし算の ひっ算 1 」「ひき算の ひっ算 1 」「数くらべ 」「たし算の ひっ算 2 」「ひき算の ひっ算 2」「かくれた 数字は なにかな」の学習ゲームを収録しています。

「たし算の ひっ算 1 」
・２位数＋２位数，２位数＋１位数の加法の，筆算形式による計算練習です。
【ねらい】
・２位数の加算のひっ算のしかたを理解して，その計算が確実にできるようにします。
「ひき算の ひっ算 1 」
・２位数－２位数，２位数－１位数の減法の，筆算形式による計算練習です。
【ねらい】
・２位数の減算のひっ算のしかたを理解して，その計算が確実にできるようにします。
「数くらべ 」
・0 から 9 までの数字のカード 3 枚を選んで 3 けたの数字をつくり，できた数の大小を競います。
【ねらい】
・数の大小を比較するためには，位取り記数法の原理に基づいて，上位の数から順に比べればよいことを，ゲームをとおして学習させ，その理解の定着を図ります。
「たし算の ひっ算 2 」
・２位数＋２位数で十の位で繰り上がりがある加法の，筆算形式による計算練習です。
・はやさと正確さを競います。
【ねらい】
・２位数どおしの加算のひっ算のしかたを理解して，その計算が確実にできるようにします。
・楽しみながら計算に習熟させます。
「ひき算の ひっ算 2」
・３位数(百の位が 1)－２位数の減法の，筆算形式による計算練習です。
・はやさと正確さを競います。
【ねらい】
・簡単な３位数から２位数の減算のひっ算のしかたを理解して，その計算が確実にできるようにします。
「かくれた 数字は なにかな」
・２位数＋２位数で十の位で繰り上がりがある加法と３位数(百の位が 1)－２位数の減法の虫食い算を行います。
【ねらい】
・虫食い算を行うことにより，計算手順の理解の定着を図ります。 It is the second volume of 2 years for elementary school "math together".
I have recorded the learning game "calculation by writing one 's plus", "calculation by writing one of the pull-san" "number Kurabe", "calculation by writing two Sun plus", "calculation by writing two of the pull-san" "number that was hidden there, and what" of .

The "calculation by writing one 's plus"
-Additive of + 1 + 2 in the number of 2, 2nd, and it is calculated by the calculation by writing practice format.
[Aim]
- To understand how the calculation by writing the addition of two digit numbers, so that you can surely for such calculations.
"Calculation by writing one of the pull-san"
-Subtraction of the number of -1 -2 Number of 2, 2nd, and it is calculated by the calculation by writing practice format.
[Aim]
- To understand how the calculation by writing the subtraction of two digit numbers, so that you can surely for such calculations.
"Number Kurabe"
• You compete the magnitude of the number to create a three-digit number to choose the three cards of the numbers 0 through 9, was able to.
[Aim]
· In order to compare the magnitude of the number, it can train throughout the game, that is based on the principle of positional notation, may be compared in order from the number of upper and plan the fixing of the understanding.
"Calculation by writing 2 's plus"
-Additive there is moved up in the tens place in the number of 2 +2 position, it is calculated by the calculation by writing practice format.
· I compete for accuracy and speed.
[Aim]
- To understand how the calculation by writing the addition of throat press 2 in number, so that you can surely for such calculations.
• You be familiar with the calculation while having fun.
"Calculation by writing two of the pull-san"
-Subtraction of -2 in number, (# 1 out of hundreds) is calculated by the calculation by writing practice format 3 digit numbers.
· I compete for accuracy and speed.
[Aim]
- To understand how the calculation by writing the subtraction of two digit numbers from a simple three-digit numbers, so that you can surely for such calculations.
The "numbers hidden there, and what"
· (Hundreds place is 1) make the moth's subtraction of -2 in number 3 of the number of addition and there is up to repeat in the tens place in the number of 2 +2 place.
[Aim]
• By performing the calculation moth-eaten, we will work the fixing of understanding of the calculation procedure.