20以内减法口算练习题4000题时间:错误率:9-6=8-2=17-16=17-13=10-2=19-9=14-8=18-10=20-11=15-2=17-11=6-5=20-14=10-7=18...
完整版100以内进位加法练习题用时:错误:6+74=28+43=84+16=15+9=33+9=29+62=8+28=44+37=48+8=37+63=19+56=48+25=17+83=18+4...
20以内三连减口算练习题(已排版)时间:错误率:16-10-6=20-8-11=18-5-4=9-1-6=13-3-7=17-15-2=15-4-10=16-1-15=20-1-5=2...
20以内加减法口算练习题时间:错误率:4+2=13-9=9+4=14-1=16+4=15-9=12-10=15-13=6+10=12-12=5+13=2+7=3+2=6+14=11-10=13-...
20以内的加法口算练习题4000题时间:错误率:3+14=3+7=7+12=1+11=8+3=8+11=2+18=11+9=1+12=10+5=11+7=15+4=5+11=4+5=12+4=1...
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