Maths

For maths today triangle did tidy number. We are given in a presentation.  

 

a) 37+18=55

   37+3=40

   18-3=15

b) 45+19=64

   45+5=50

   19-5=14

c) 24+17=41

   24-4=20

17+4=21

d) 71+27=98

   71-1=70

27+1=28

3) 82+14=96

   82-2=80

   14+2=16

f)  37+38=75

   38+2=40

   37-2=35

g) 42+54=96

   42-2=40

   54+2=56

h) 69+23=92

   69+1=70

   23-1=22

i)  46+32=78

   32-2=30

   46+2=48

j) 84+12=96

12-2=10

84+2=86

k) 33+32=65

32-2=30

33+2=35

l) 46+48=94

46+4=50

48-4=44

m) 62+34=

62-2=60

34+2=36

n) 46+23=69

23-3=20

46+3=49

o) 53+16=69

53-3=50

16+3=19

p) Because you have to add on one and subtract on the other.