8.6－3.9= 5.5－4.7= 8.4－2.8＝ 9.4＋8.7＝
10＋4.7＝ 10－5.5＝ 3.6＋3.7＝ 4.4－2.8＝
7.5－4.7＝ 4.7＋2.9＝ 5.3－3.8＝ 5.6＋8.8＝
8.3－4.7＝ 21.8+30.6= 45.8+32.1= 98.4-64.3= 13.5+12.3= 44.8+36.7= 72.6+54.3= 46.3+23.7= 46.5-36.1= 87.3-55.6= 2.6＋4.8＝ 6.413.2+65.3= 36.4+54.1= 12.3+13.4= 55.4+44.6= 38.8+42.1= 45.2+16.3= 85.3-23.6= 66.3-45.7= 77.6-44.9= －4.5＝ 88.4-52.7= 28.4+12.3= 45.3+86.2= 100-54.9= 56.3+23.5= 99.2-54.6= 56.7-42.8= 45.6-12.3= 88.4-51.9= 1
4.7＋4.9＝
50.8+35.6=
62.3+27.7= 67.4-35.5=
24.6+13.6= 58.8+46.7= 44.6+23.8=
56.3+45.2= 45.6-12.8= 22.8+46.7=
1.3+12.7= 5.8+56.7= 45.7+61.8= 12.3+46.2=
56.7+4.9= 15.7+46.5= 23.5+48.7= 15.6+74.3=
23.5+46.7= 56.3+14.7= 56.3-28.7= 15.7-5.6=
2
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