小數加減法:

１.8+3.9=

3.7+8.4=

5.6+1.4=

2.9+4.5=

2.8+4.7=

脫式計算:

4.6+2.7-3.1

=

=

31.7+2.3+4.9

=

=

28.1-3.9+1.6

=

=

36.6-2.4-1.9

=

=

3.4+1.6+2.9

=

=

簡便計算:

(9.6+10.4)+1.1

=

=

10+9.6+10+0.4

=

=

9.4+10.6-10

=

=

1.4+1.4+2.2

=

=

56.8+43.2-10

=

=