四、解决问题
★单元练习2
建议用时:6分钟
实际用时:分钟
37÷6 =
62÷7 =
71÷8 =
13÷6 =
36÷6 =
80÷9 =
70÷9 =
32÷6 =
30÷7 =
54÷6 =
36÷7 =
4×9 =
72÷8 =
32+45 =
24÷6 =
370-20 =
680-450 =
400-300 =
37-34 =
21-6 =
420-20 =
450-160 =
820-130 =
770-40 =
150-80 =
760-80 =
470-60 =
180-90 =
920-800 =
250+400 =
6400-6000 =
270-140 =
1000-500 =
660-580 =
900-300 =
1000-600 =
300-180 =
1000-100 =
130-80 =
270-90 =
64-38 =
270-70 =
40-32 =
210-60 =
270-40 =

$37÷6=6······1$
$62÷7=8······6$
$71÷8=8······7$
$13÷6=2······1$
$36÷6=6$
$80÷9=8······8$
$70÷9=7······7$
$32÷6=5······2$
$30÷7=4······2$
$54÷6=9$
$36÷7=5······1$
$4×9=36$
$72÷8=9$
$32+45=77$
$24÷6=4$
$370-20=350$
$680-450=230$
$400-300=100$
$37-34=3$
$21-6=15$
$420-20=400$
$450-160=290$
$820-130=690$
$770-40=730$
$150-80=70$
$760-80=680$
$470-60=410$
$180-90=90$
$920-800=120$
$250+400=650$
$6400-6000=400$
$270-140=130$
$1000-500=500$
$660-580=80$
$900-300=600$
$1000-600=400$
$300-180=120$
$1000-100=900$
$130-80=50$
$270-90=180$
$64-38=26$
$270-70=200$
$40-32=8$
$210-60=150$
$270-40=230$

拓展园地
右面的加法竖式中,相同的图形代表相同的数字,不同的图形代表不同的数字。要使竖式成立,“☆”代表什么数字?

8