Question

1) (81.1+2.8)+3.3= 2)calculati 20m+15cm+1.2dm in cm. 3)(3.45+8,21)-(2.19+4,37)=

Answer 1

1) (81.1+2.8)+3.3=
=83.9+3.3=
=87.2

2) 20m+15cm+1.2dm=
=2000cm+15cm+12cm=
=2027cm

3) (3.45+8,21)-(2.19+4,37)=
=11.66-6.56=
=5.1

Succes!