四、解决问题
★信息窗 3-1
建议用时:7 分钟
实际用时:分钟
46 - 30 + 17 =
56 - 3 + 42 =
57 - 36 + 41 =
53 - 6 + 7 =
200 + 40 + 60 =
30 + 42 + 3 =
470 - 20 + 30 =
20 + 30 + 70 =
50 + 60 + 40 =
45 + 36 - 41 =
94 + 6 + 300 =
90 - 40 + 600 =
45 + 30 + 7 =
11 + 42 - 36 =
47 - 31 + 42 =
3×7 + 40 =
3×8 + 8 =
41 - 38 + 6 =
30÷6 + 5 =
27 + 20 + 46 =
60 + 30 - 60 =
21 + 30 + 40 =
90 - 60 + 300 =
37 + 46 + 2 =
200 + 400 + 70 =
400 + 30 + 400 =
300 + 600 - 40 =
1000 - 600 + 300 =
5000 - 4000 + 600 =
3000 - 600 - 400 =
2×9 =
15 + 70 =
65 - 30 =
150 - 90 =
220 + 90 =
37 ÷ 8 =
36 ÷ 4 =
49 ÷ 7 =
180 + 60 =
27 ÷ 3 =
40 + 400 =
5×8 =
3×7 =
200 - 60 =
17 ÷ 5 =

$46-30+17=33$
$56-3+42=95$
$57-36+41=62$
$53-6+7=54$
$200+40+60=300$
$30+42+3=75$
$470-20+30=480$
$20+30+70=120$
$50+60+40=150$
$45+36-41=40$
$94+6+300=400$
$90-40+600=650$
$45+30+7=82$
$11+42-36=17$
$47-31+42=58$
$3×7+40=61$
$3×8+8=32$
$41-38+6=9$
$30÷6+5=10$
$27+20+46=93$
$60+30-60=30$
$21+30+40=91$
$90-60+300=330$
$37+46+2=85$
$200+400+70=670$
$400+30+400=830$
$300+600-40=860$
$1000-600+300=700$
$5000-4000+600=1600$
$3000-600-400=2000$
$2×9=18$
$15+70=85$
$65-30=35$
$150-90=60$
$220+90=310$
$37÷8=4······5$
$36÷4=9$
$49÷7=7$
$180+60=240$
$27÷3=9$
$40+400=440$
$5×8=40$
$3×7=21$
$200-60=140$
$17÷5=3······2$

拓展园地
停车场的三轮车和小汽车一共有8辆，共有29个轮子，那么停车场有()辆三轮车、()辆小汽车。

3；5