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19-39 11-415 14-411-2
713-6 16-712 13-915-7
11-9= 14-5= 16-9= 16-7= 11-6=
15-8= 13-6= 11-2= 16-8= 14-6=
17-8= 15-9= 13-8= 15-6= 14-9=
算式:16-8
① 红花比黄花多多少朵?( ) ②红花和白花共有多少朵?( )
11-3= 8+4= 13-9= 18-9=
9+4= 18-8= 16-7= 12-4=
12-9= 14-6= 7+5= 5+6=
15-7= 20-10= 12+7= 11-7=
15-98 613-7 19-614
4+516-8 1017-9 129+4
15-410 312-8 118+3
12-7 11-4 13-7 15-7 18-9
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