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1、1、100里面有( )个十。2、5个一和3个十是( )。3、62前面第三个数是( ), 48后面第三个数是( )。4、39添1是( )个十。付的钱数-应付的钱数=应找的钱数7+53+10= 46-6+40= 13-(6+3)= 34+8+50= 73+20-3= 8+(4+7)=54-5+30=26+3+8= 40+20+8= 90-(16+4)= 87-9-10= 76-6-8=43-(3+27)= 65-7-40= 36+40+2=59-9-20=39-(9-5)= 63-30+5= 30+(11-4)= 67-8-50=47+(18-9)= 75-(10+50)=17+6+8= 43-8
2、-30=13+7+54= 38+(46+4)= 60+38-90= 50+27-9=(27-20)= 40+(15-8)= 87-9-10= 65-7-40=7+53+10= 46-6+40= 26+3+8= 34+8+50=73+20-3= 8+(4+7)= 13-(6+3)=40+20+8= 90-(16+4)= 54-5+30=87-9-10= 43-(3+27)= 76-6-8=65-7-40= 36+40+2= 59-9-20= 39-(9-5)= 63-30+5= 30+(11-4)=47+(18-9)= 40+(15-8)= 75- (10+50)=76- 13+7+54= 67
3、-8-50= 38+(46+4)=(27-20)= 17+6+8= 43-8-30= 60+38-90= 50+27-9= 54+(17+3)=(68-60)= 7+7-6= 5+46-6= 47+8-6= 13-4+5= 13-(4+5)= 6+40+30= 20+50+9= 80-(50-20)= 11-9= 12-9= 13-9= 14-9= 15-9= 16-9= 17-9=18-9= 11-8= 12-8= 13-8= 14-8= 15-8= 16-8= 17-8=11-7= 12-7= 13-7= 14-7= 15-7= 16-7= 11-6= 12-6= 13-6= 14-6=
4、15-6= 11-5= 12-5= 13-5= 14-5= 11-4= 12-4= 13-4= 11-3= 12-3= 11-2=9+9= 18-6= 10+9= 13+5= 15-10= 70+8= 40+4= 5+70= 3+90= 78-8= 44-4= 75-70= 93-90= 78-70=44-40= 75-5= 93-3= 54-4= 2+70= 65-5= 20+6= 90+5= 77-7= 69-60= 28-20= 37-7= 6+70= 34-30= 89-9= 20+30= 30+40= 50+30= 80+10= 50-20= 70-40= 80-30= 90-10=
5、 90-80= 40+30= 80-80= 90-40= 9+30= 7+70= 20+20= 60-50= 95-5= 35+3= 2+86= 43+50= 30+15= 48+40= 40+40= 20+70= 24+70= 30+50= 30+59= 60+30= 60+37= 46+7= 8+63= 5+35= 48+9= 35+4= 35+40= 42+3= 42+30= 23+5= 23+50= 7+21= 70+21= 64+30= 86+2= 93+4= 20+67= 5+31= 45+30= 58+20= 4+72= 27+6= 39+5= 6+54= 8+79= 13+70
6、= 25+6= 48+4= 79+2= 25+60= 48+40= 79+20= 80+9= 59+8= 84+5= 47+20= 49+4= 3+86= 23+30= 39+50= 20+6= 25+6= 77+6= 33+4= 8+34= 60+34=26-4= 49-5= 87-3= 38-2= 30-10= 50-20= 70-40= 60-50= 38-10= 57-20= 76-40= 69-5057-3= 99-8= 65-4= 48-6= 89-7= 26-2= 37-5= 75-4= 63-20= 46-3= 37-4= 72-50= 59-30= 28-7= 84-4= 96-60= 50-6= 34-7= 85-9= 63-8= 48-5= 74-6= 43-7= 52-9= 74-6= 74-60= 60-3= 60-30= 92-7= 92-70= 53-4= 53-40= 50-6= 41-6= 35-6= 63-6= 82-6= 74-6= 70-8= 27-8= 95-8= 84-8= 53-8= 43-8= 93-30= 76-4= 84-9= 50-5=