21+5= 34+4= 44+4= 43+5= 23+5= 4+23= 33+6= 42+5= 25+3= 22+3= 34+5= 6+31= 37+2= 55+4= 62+4= 24+4= 32+3= 5+34= 25+4= 64+2= 27+2= 54+4= 53+3= 7+21= 41+5= 22+7= 85+3= 56+3= 22+6= 3+46= 45+4= 66+2= 23+4= 75+4= 43+6= 7+12= 23+3= 93+6= 72+5= 32+7= 42+6= 4+34= 33+3= 63+5= 33+4= 65+3= 21+4= 3+42= 22+2= 25+4= 52+7= 52+5= 32+5= 5+32= 26+3= 33+5= 24+5= 36+3= 24+3= 7+14= 两位数加整十数

21+50= 34+40= 44+40= 43+50= 23+50= 33+60= 42+50= 25+30= 22+30= 34+50= 37+20= 55+40= 52+40= 24+40= 32+30= 25+40= 64+20= 27+20= 54+40= 53+30= 41+50= 22+70= 85+10= 56+30= 22+60= 45+40= 66+20= 23+40= 75+20= 43+50= 23+30= 93+20= 72+20= 32+60= 42+40= 33+30= 63+30= 33+40= 65+30= 21+40= 22+20= 25+40= 52+30= 52+30= 32+50= 26+30= 33+50= 24+50= 36+30= 24+30= 两位数减一位数（不退位）

25-2= 45-2= 26-2= 58-6= 26-3= 69-4= 77-5= 88-4= 79-5= 68-4= 76-4= 28-5= 89-5= 36-4= 29-4= 27-3= 89-3= 47-5= 78-6= 49-5= 79-4= 96-2= 99-6= 89-4= 75-4=

85-2= 56-4= 99-2= 28-4= 66-4= 38-5= 99-3= 27-4= 85-2= 27-2= 95-2= 97-4= 98-5= 69-5= 78-4= 77-4= 88-6= 78-5= 79-6= 29-5= 29-8= 25-3= 74-2= 48-3= 36-3= 两位数减整十数

55-20= 45-20= 66-20= 98-60= 56-30= 69-40= 77-50= 88-40= 79-50= 76-40= 88-50= 89-50= 56-40= 97-30= 89-30= 77-50= 78-60= 79-40= 96-20= 99-60= 89-40= 85-20= 56-40= 99-20= 68-40= 88-50= 99-30= 77-40= 85-20= 95-20= 97-40= 98-50= 69-50= 77-40= 88-60= 78-50= 79-60= 99-80= 55-30= 74-20= 48-30= 笔算下列各题：

320 + 210 = 560 + 110 =440 – 130 = 360 – 270 = 710 – 230 =420 – 130 = 250 – 160 = 520 – 140 =960 – 580 = 760 – 290 = 550 – 290 =310 – 120 = 250 + 220 = 370 + 120 =840 + 160 = 480 + 230 = 330 + 390 =450 + 470 = 550 + 390 = 190 + 250 =360 +250 = 780 – 250 = 360 – 120 = 120+80= 130-90= 400+40= 750-20= 860-400= 130-90= 90+300= 68-40= 99-40= 99-50= 75-40= 66-40= 47-20= 78-40= 99-50= 56-30=

660 – 250 = 370 – 280 = 630 – 250 = 440 -250 = 770 + 240 = 390 + 250 = 440 + 180 = 150+40= 120+60= 150+80=