Mon carnet de calcul mental Mon carnet de calcul mental Mon carnet de calcul mental

(1)

NIVEAU 3

Mon carnet de calcul mental

+ - × ÷

NIVEAU 3

+ - × ÷

NIVEAU 3

+ - × ÷ le bl og du ca nc re .c om le bl og du ca nc re .c om le bl og du ca nc re .c om

(2)

Retirer 9 19 -40 9 = -45 9 = -39 9 = -48 9 = -93 9 = -76 9 = -13 9 = -25 9 = -46 9 = -26 9 = / 10 Retirer 9 19 -40 9 = -45 9 = -39 9 = -48 9 = -93 9 = -76 9 = -13 9 = -25 9 = -46 9 = -26 9 = / 10 Retirer 9 19 -40 9 = -45 9 = -39 9 = -48 9 = -93 9 = -76 9 = -13 9 = -25 9 = -46 9 = -26 9 = / 10

(3)

Trouver le complément à la dizaine supérieure 20 + 2 = 10 + 12 = 20 + 3 = 10 + 63 = 70 + 43 = 50 + 22 = 30 + 75 = 80 + 31 = 40 + 89 = 90 + 56 = 60 / 10

(4)

Ajouter 5 à un multiple de 5 21 + 5 5 = + 10 5 = + 35 5 = + 20 5 = + 55 5 = + 70 5 = + 95 5 = + 75 5 = + 85 5 = + 65 5 = / 10 Ajouter 5 à un multiple de 5 21 + 5 5 = + 10 5 = + 35 5 = + 20 5 = + 55 5 = + 70 5 = + 95 5 = + 75 5 = + 85 5 = + 65 5 = / 10 Ajouter 5 à un multiple de 5 21 + 5 5 = + 10 5 = + 35 5 = + 20 5 = + 55 5 = + 70 5 = + 95 5 = + 75 5 = + 85 5 = + 65 5 = / 10

(5)

Ajouter un multiple de 10 22 + 20 10 = + 30 50 = + 40 30 = + 70 20 = + 60 30 = + 20 20 = + 50 30 = + 20 60 = + 40 40 = + 30 30 = / 10 Ajouter un multiple de 10 22 + 20 10 = + 30 50 = + 40 30 = + 70 20 = + 60 30 = + 20 20 = + 50 30 = + 20 60 = + 40 40 = + 30 30 = / 10 Ajouter un multiple de 10 22 + 20 10 = + 30 50 = + 40 30 = + 70 20 = + 60 30 = + 20 20 = + 50 30 = + 20 60 = + 40 40 = + 30 30 = / 10

(6)

Retirer un multiple de 10 23 -40 10 = -40 20 = -70 50 = -90 80 = -60 30 = -90 10 = -70 40 = -60 60 = -90 30 = -50 30 = / 10 Retirer un multiple de 10 23 -40 10 = -40 20 = -70 50 = -90 80 = -60 30 = -90 10 = -70 40 = -60 60 = -90 30 = -50 30 = / 10 Retirer un multiple de 10 23 -40 10 = -40 20 = -70 50 = -90 80 = -60 30 = -90 10 = -70 40 = -60 60 = -90 30 = -50 30 = / 10

(7)

Trouver le complément à 100 24 + 20 = 100 + 30 = 100 + 50 = 100 + 70 = 100 + 90 = 100 + 15 = 100 + 25 = 100 + 49 = 100 + 67 = 100 + 84 = 100 / 10 Trouver le complément à 100 24 + 20 = 100 + 30 = 100 + 50 = 100 + 70 = 100 + 90 = 100 + 15 = 100 + 25 = 100 + 49 = 100 + 67 = 100 + 84 = 100 / 10 Trouver le complément à 100 24 + 20 = 100 + 30 = 100 + 50 = 100 + 70 = 100 + 90 = 100 + 15 = 100 + 25 = 100 + 49 = 100 + 67 = 100 + 84 = 100 / 10

(8)

Ajouter un nb à 1 chiffre à un nb à 2 chiffres (sans retenue) 25 + 20 5 = + 30 7 = + 42 5 = + 71 2 = + 68 1 = + 63 5 = + 70 9 = + 84 5 = + 95 3 = + 73 6 = / 10

(9)

Ajouter un nb à 1 chiffre à un nb à 2 chiffres (avec retenue) 26 + 25 5 = + 26 5 = + 27 5 = + 46 6 = + 68 3 = + 63 8 = + 77 7 = + 89 8 = + 95 8 = + 78 4 = / 10

(10)

Multiplier et diviser par 2 27 × 3 2 = × 5 2 = × 2 = 14 × 2 = 16 × 2 9 = ÷ 6 2 = ÷ 10 2 = ÷ 14 2 = ÷ 16 2 = ÷ 18 2 = / 10