二、解决问题
★单元练习
建议用时:6分钟
实际用时:分钟
36+47 =
83+7 =
21+36 =
42+54 =
170+400 =
660+180 =
110+70 =
890+10 =
400+900 =
180+800 =
21÷5 =
6×3 =
70+13 =
36+50 =
79÷8 =
28+37 =
720+40 =
310+130 =
700+20 =
800+800 =
890+100 =
1000+400 =
620+80 =
70+420 =
800+1000 =
54+33 =
25+15 =
70-6 =
25+36 =
70-31 =
210+400 =
4000+1600 =
180+600 =
630+240 =
150+270 =
8000+400 =
900+2000 =
800+300 =
1700+200 =
600+1000 =
56+37 =
34-27 =
9×8 =
32÷9 =
47+53 =

36+47 = 83
83+7 = 90
21+36 = 57
42+54 = 96
170+400 = 570
660+180 = 840
110+70 = 180
890+10 = 900
400+900 = 1300
180+800 = 980
21÷5 = 4……1
6×3 = 18
70+13 = 83
36+50 = 86
79÷8 = 9……7
28+37 = 65
720+40 = 760
310+130 = 440
700+20 = 720
800+800 = 1600
890+100 = 990
1000+400 = 1400
620+80 = 700
70+420 = 490
800+1000 = 1800
54+33 = 87
25+15 = 40
70-6 = 64
25+36 = 61
70-31 = 39
210+400 = 610
4000+1600 = 5600
180+600 = 780
630+240 = 870
150+270 = 420
8000+400 = 8400
900+2000 = 2900
800+300 = 1100
1700+200 = 1900
600+1000 = 1600
56+37 = 93
34-27 = 7
9×8 = 72
32÷9 = 3……5
47+53 = 100

拓展园地
小虎在做一道加法题时，因不细心把一个加数个位上的6看成了4，结果算出的和是65。原来正确的得数是多少？

6 - 4 = 2
65 + 2 = 67
答：原来正确的得数是67。