6.78＋2.47=                        0.58－0.065=

8.36＋2.54=                 0.54－0.26=

6.4＋3.6=     0.9－0.09=     1－0.05=

0.3＋0.5=     5.7－0.9=     7.3＋2.7=

0.3＋0.65=     3.5－2.5=     1.75＋0.25=

4.63＋2.4=     4.7－3=     3.6－1.8=

0.06＋15=     2－0.68=    0.28＋1.5=

10－0.8=

18－6.82=              7.32＋12.68=

8.47＋5.68=                 4.8－0.756=

1.4＋3.8=     9.7－6.5=     3.75－2.25=

10－9.2=     4.2－1.6=     42.3＋5.6=

0.27＋0.73=     4.24＋3.6=     1.4＋0.3=

0.5＋0.08=    1－0.03=     7.2－3.7=

3－0.52=     4.6－1.4=     0.12＋0.03=

4.6－1.4=