Calcul mental [Concours | Semaine des Maths]

 $8\times12$  

• 76

• 82

• 86

• 96

 $6-2²=$  

• 16

• 2

• 4

• autre réponse

 $81\div3$  

• 9

• 12

• 27

• 18

If 3.42 x 7 = 23.94 then 34.2 x 0.7 =

• 2394

• 239.4

• 23.94

• 2.394

The area of a square with perimeter 48 cm ...

• 12 cm²

• 14 cm²

• 124 cm²

• other answer

1000 - 123

• 877

• 787

• 887

• 977

• 1123

A train leaves at 8:50 am and arrives at 11:05 am. How long is the journey ?

• 2 hours and 15 minutes

• 3 hours and 15 minutes

• 2 hours and 50 minutes

• 2 hours and 10 minutes

• other

A 25% discount on a product that costs 110 euros will save you....

• 25 €

• 10 €

• 27.5 €

• 82.5€

 $50\times45=$  

• 2250

• 2220

• 2025

• 2225

 $18+34+26+52=$  

• 140

• 100

• 130

• 125