CALCULO MENTAL

100x10+150=

• 1500

• 1150

• 1050

• 10150

1000/40=

• 250

• 25

• 5

1/2 + 1/4=

• 2/6

• 3/4 = 6/8

• 2/6= 6/8

1/3 + 1/6=

• 3/6 = 9/18

• 2/9

• 2/6 = 9/18

1/2 - 1/8 =

• 2/6

• 6/6

• 3/8 =6/16

1/2 x 2/3 =

• 1/3 = 2/6

• 2/6 = 2/5

• 2/5

Qué número sigue en esta serie? 4, 8 16, 32, ______

• 62

• 48

• 64

• 40

Un entero menos 3/4=

• 1/3

• 2/4

• 2/3

• 1/4

1/2 + 1/4=

• 2/6 =1/3

• 3/4 = 6/8

• 2/6 = 3/4

• 3/4= 2/6

4.70 + 0.30 =

• 5.10

• 4.100

• 5

• 4