Zajímavá matematika T R K A L O Č Y =

Prezentace na téma: "Zajímavá matematika T R K A L O Č Y ="— Transkript prezentace:

1 Zajímavá matematika 11 12 13 14 15 16 17 18 T R K A L O Č Y 7 + 6 =
T R K A L O Č Y 7 + 6 = 8 + 8 = 6 + 9 = 7 + 9 = 6 + 5 = 9 + 8 = 7 + 6 = 9 + 7 = 8 + 9 = 9 + 4 = 8 + 6 = 8 + 5 = 9 + 9 = 7 + 4 = 6 + 8 = 7 + 5 = 7 + 7 = 4 + 9 = 9 + 9 = 5 + 6 = 6 + 7 = 5 + 9 = 4 + 9 = 7 + 7 = 5 + 7 = 3 + 8 = 9 + 9 = 5 + 7 = 8 + 8 = =

2 Kontrola- soutěž 7 + 6 = 13 K 8 + 8 = 16 O 6 + 9 = 15 L 7 + 9 = 16 O
9 + 8 = Č 8 + 5 = K 9 + 9 = Y 7 + 4 = T 6 + 8 = A 7 + 5 = R 7 + 7 = A 4 + 9 = K 9 + 9 = Y 5 + 6 = T 6 + 7 = K 5 + 9 = A 7 + 6 = K 9 + 7 = O 8 + 9 = Č 9 + 4 = K 8 + 6 = A 4 + 9 = K 7 + 7 = A 5 + 7 = R 3 + 8 = T 9 + 9 = Y 5 + 7 = R 8 + 8 = O = 13 K

3 Slovní úloha Zdeňka koupila chleba za 25 korun a sýr za 20 korun. Kolik korun zaplatila? ………………………. ……………………….. …………………………… …………………………………………………………………………… Kolik korun prodavačka Zdeňce vrátila, když platila 100 korunou? ………………………………… nákup…………….. platila…………….. vrátila…………….. ……………………………………………

4 Slovní úloha- kontrola:
zápis: chleba……..25 Kč sýr………….20 Kč celkem……..?...... příklad = 45 odpověď Celkem zaplatila 45 korun. příklad 100 – 45 = 55 nákup ……….45 Kč platila…………100 Kč vrátila…………? Paní prodavačka vrátila Zdeňce 55 korun.

5 Slovní úloha Martina má 25 pastelek. Renata má o 5 pastelek méně než Martina. Lucka má o 10 pastelek více než Martina. Kolik pastelek mají Renata a Lucka dohromady? ……………………… ……………………… ………………………. ……………………………………………………………………

6 Slovní úloha- kontrola:
zápis Martina…..25 pastelek Renata…..o 5 pastelek méně než Martina Lucka …..o 10 pastelek více než Martina Renata a Lucka dohromady…….? Renata…… 25 – 5 = 20 Lucka…… = 35 dohromady…… = 55 odpověď Renata a Lucka mají dohromady 55 pastelek.

7 Počítání se závorkami (60 + 40)- 20 = 12 – (50 – 40) =
40 + (80 – 30) = (100 – 80) + 55 = ( ) – 40 = 15 + ( ) = (100 – 30) – 20 = 18 – (80 – 70) = 50 + ( 100 – 50) = (70 – 50) + 40 = 80 – (50 – 20) = ( ) + 30 = (90 – 60) – 20 = ( ) – 100 = (35 + 5) + 40 = 100 – (80 – 20) = ( ) – 15 = (70 – 10) + 20 = 25 + (100 – 60) = 90 – ( ) =

8 Kontrola: (60 + 40) – 20 = 100 – 20 = 80 80 – (50 – 20) = 80 – 30 = 50
12 – (50 – 40) = 12 – 10 = 2 40 + (80 – 30) = = 90 (100 – 80) + 55 = = 75 ( ) – 40 = 50 – 40 = 10 15 + ( ) = = 85 (100 – 30) – 20 = 70 – 20 = 50 18 – (80 – 70) = 18 – 10 = 8 50 + (100 – 50) = = 100 (70 – 50) + 40 = = 60 80 – (50 – 20) = 80 – 30 = 50 ( ) + 30 = = 70 (90 – 60) – 20 = 30 – 20 =10 ( ) – 100 = 100 – 100 =0 ( ) + 40 = = 80 100 – (80 – 20) = 100 – 60 = 40 ( ) – 15 = 80 – 15 = 65 (70 – 10) + 20 = = 80 25 + (100 – 60) = = 65 90 – ( ) = 90 – 60 = 30

9 Porovnávání čísel 74 …..47 85…..58 100…98 28…..82 17…..71 36…..37
42…..41 85…..83 75…..75 81…..82 58…..55 54…..45 69…..67 24…..23 37…..36 29…..30 18…..17 95…..97 72…..61 31…..32 100…99 78…..79 54…..55 84…..83 36…..35 84…..48 62…..26 55…..55 97… .98

10 Porovnávání čísel- kontrola:
74 > 47 85 > 58 100 >98 28 < 82 17 < 71 36 < 37 42 > 41 85 > 83 75 = 75 81 < 82 58 > 55 54 > 45 69 > 67 24 > 23 37 > 36 29 < 30 18 > 17 95 < 97 72 > 61 31 < 32 100 >99 78 < 79 54 < 55 84 > 83 36 > 35 84 > 48 62 > 26 55 = 55 97 < 98

11 Procvičuj: 54 + ___ = 60 23 + ___ = 30 66 + ___ = 70 21 + ___ = 30
35 + ___ = 40 65 + ___ = 70 87 + ___ = 90 94 + ___ = 100 46 + ___ = 50 99 + ___ = 100 62 + ___ = 70 34 + ___ = 40 61 + ___ = 70 22 + ___ = 30 56 + ___ = 60 95 + ___ = 100 84 + ___ = 90 24 + ___ = 30 48 + ___ = 50 73 + ___ = 80

12 Kontrola: = 70 = 40 = 70 = 30 = 60 = 100 = 90 = 30 = 50 = 80 = 60 = 30 = 70 = 30 = 40 = 70 = 90 = 100 = 50 = 100

13 Procvičuj: 70 - ___ = 61 40 - ___= 34 60 - ___ = 51 30 - ___ = 27
40 - ___= 34 60 - ___ = 51 30 - ___ = 27 70 - ___ = 64 80 - ___ = 71 90 - ___ = 82 40 - ___ = 31 100 - __ = 99 50 - ___ = 42 60 - ___ = 58 40 - ___ = 31 90 - ___ = 81 60 - ___ = 55 80 - ___ = 75 30 - ___ = 23 70 - ___ = 66 50 - ___ = 48 100 - __ = 94 80 - ___ = 71

14 Kontrola: 60 – 2 = 58 40 – 9 = 31 90 – 9 = 81 60 – 5 = 55 80 – 5 = 75 30 – 7 = 23 70 – 4 = 66 50 – 2 = 48 100 – 6 = 94 80 – 9 = 71 70 – 9 = 61 40 – 6 = 34 60 – 9 = 51 30 – 3 = 27 70 – 6 = 64 80 – 9 = 71 90 – 8 = 82 40 – 9 = 31 100 – 1 = 99 50 – 8 = 42

15 Řetěz čísel: Kontrola: 60 + 40 - 20 – 20 + 30 – 10 =
– 35 – = 90 – 30 – = 70 – 30 – – 70 = Kontrola: – 20 – – 10 = 80 – 35 – = 70 90 – 30 – = 90 70 – 30 – – 70 = 0