1. $5+6=$
$11-5=$
$11-6=$
$9+7=$
$16-9=$
$16-7=$
$3+8=$
$11-3=$
$11-8=$
$11-5=$
$11-6=$
$9+7=$
$16-9=$
$16-7=$
$3+8=$
$11-3=$
$11-8=$
答案
$5+6=11$
$11-5=6$
$11-6=5$
$9+7=16$
$16-9=7$
$16-7=9$
$3+8=11$
$11-3=8$
$11-8=3$
$11-5=6$
$11-6=5$
$9+7=16$
$16-9=7$
$16-7=9$
$3+8=11$
$11-3=8$
$11-8=3$
2. $11-7=$
$12-7=$
$14-8=$
$15-8=$
$17-9=$
$18-9=$
$12-7=$
$14-8=$
$15-8=$
$17-9=$
$18-9=$
答案
11-7:
10-7=3
3+1=4
11-7=4
12-7:
10-7=3
3+2=5
12-7=5
14-8:
10-8=2
2+4=6
14-8=6
15-8:
10-8=2
2+5=7
15-8=7
17-9:
10-9=1
1+7=8
17-9=8
18-9:
10-9=1
1+8=9
18-9=9
10-7=3
3+1=4
11-7=4
12-7:
10-7=3
3+2=5
12-7=5
14-8:
10-8=2
2+4=6
14-8=6
15-8:
10-8=2
2+5=7
15-8=7
17-9:
10-9=1
1+7=8
17-9=8
18-9:
10-9=1
1+8=9
18-9=9
3. $45+3=$
$45+30=$
$45+7=$
$45-3=$
$45-30=$
$45-7=$
$4+25=$
$40+25=$
$8+25=$
$45+30=$
$45+7=$
$45-3=$
$45-30=$
$45-7=$
$4+25=$
$40+25=$
$8+25=$
答案
45+3:
45=40+5
5+3=8
40+8=48
45+3=48
45+30:
45=40+5
40+30=70
70+5=75
45+30=75
45+7:
45=40+5
5+7=12
40+12=52
45+7=52
45-3:
45=40+5
5-3=2
40+2=42
45-3=42
45-30:
45=40+5
40-30=10
10+5=15
45-30=15
45-7:
45=35+10
10-7=3
35+3=38
45-7=38
4+25:
25=20+5
4+5=9
20+9=29
4+25=29
40+25:
25=20+5
40+20=60
60+5=65
40+25=65
8+25:
25=20+5
8+5=13
20+13=33
8+25=33
45=40+5
5+3=8
40+8=48
45+3=48
45+30:
45=40+5
40+30=70
70+5=75
45+30=75
45+7:
45=40+5
5+7=12
40+12=52
45+7=52
45-3:
45=40+5
5-3=2
40+2=42
45-3=42
45-30:
45=40+5
40-30=10
10+5=15
45-30=15
45-7:
45=35+10
10-7=3
35+3=38
45-7=38
4+25:
25=20+5
4+5=9
20+9=29
4+25=29
40+25:
25=20+5
40+20=60
60+5=65
40+25=65
8+25:
25=20+5
8+5=13
20+13=33
8+25=33
4. $14-9+6=$
$73-6+20=$
$15-8-5=$
$13+20-4=$
$9+8-7=$
$67+5-4=$
$73-6+20=$
$15-8-5=$
$13+20-4=$
$9+8-7=$
$67+5-4=$
答案
14-9+6
=5+6
=11
73-6+20
=67+20
=87
15-8-5
=7-5
=2
13+20-4
=33-4
=29
9+8-7
=17-7
=10
67+5-4
=72-4
=68
=5+6
=11
73-6+20
=67+20
=87
15-8-5
=7-5
=2
13+20-4
=33-4
=29
9+8-7
=17-7
=10
67+5-4
=72-4
=68
5. 在〇里填“>”“<”或“=”。
$52-30〇52-3$
$27+6〇27-6$
$68-4〇64-8$
$8+48〇96-40$
$52-30〇52-3$
$27+6〇27-6$
$68-4〇64-8$
$8+48〇96-40$
答案
$52-30=22$
$52-3=49$
$22<49$,所以$52-30<52-3$
$27+6=33$
$27-6=21$
$33>21$,所以$27+6>27-6$
$68-4=64$
$64-8=56$
$64>56$,所以$68-4>64-8$
$8+48=56$
$96-40=56$
$56=56$,所以$8+48=96-40$
$52-3=49$
$22<49$,所以$52-30<52-3$
$27+6=33$
$27-6=21$
$33>21$,所以$27+6>27-6$
$68-4=64$
$64-8=56$
$64>56$,所以$68-4>64-8$
$8+48=56$
$96-40=56$
$56=56$,所以$8+48=96-40$
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