填一填
∠1是( )角
∠2是( )角
∠3是( )角
∠4是( )角
∠5是( )角
∠6是( )角
∠1是( )角
∠2是( )角
∠3是( )角
∠4是( )角
∠5是( )角
∠6是( )角
答案:
钝;钝;直;直;锐;锐
解析:根据角的大小判断,∠1大于90°为钝角,∠2大于90°为钝角,∠3、∠4等于90°为直角,∠5、∠6小于90°为锐角。
解析:根据角的大小判断,∠1大于90°为钝角,∠2大于90°为钝角,∠3、∠4等于90°为直角,∠5、∠6小于90°为锐角。
17+7=
答案:
24
解析:$17 + 7 = 24$
解析:$17 + 7 = 24$
44+10+19=
答案:
73
解析:$44 + 10 + 19 = 54 + 19 = 73$
解析:$44 + 10 + 19 = 54 + 19 = 73$
8×4-6=
答案:
26
解析:$8×4 - 6 = 32 - 6 = 26$
解析:$8×4 - 6 = 32 - 6 = 26$
8+13=
答案:
21
解析:$8 + 13 = 21$
解析:$8 + 13 = 21$
51-(20-6)=
答案:
37
解析:$51 - (20 - 6) = 51 - 14 = 37$
解析:$51 - (20 - 6) = 51 - 14 = 37$
4×5+6=
答案:
26
解析:$4×5 + 6 = 20 + 6 = 26$
解析:$4×5 + 6 = 20 + 6 = 26$
99-39=
答案:
60
解析:$99 - 39 = 60$
解析:$99 - 39 = 60$
36+50-7=
答案:
79
解析:$36 + 50 - 7 = 86 - 7 = 79$
解析:$36 + 50 - 7 = 86 - 7 = 79$
24÷8+19=
答案:
22
解析:$24÷8 + 19 = 3 + 19 = 22$
解析:$24÷8 + 19 = 3 + 19 = 22$
61-23=
答案:
38
解析:$61 - 23 = 38$
解析:$61 - 23 = 38$
60-(55-5)=
答案:
10
解析:$60 - (55 - 5) = 60 - 50 = 10$
解析:$60 - (55 - 5) = 60 - 50 = 10$
6×2-3=
答案:
9
解析:$6×2 - 3 = 12 - 3 = 9$
解析:$6×2 - 3 = 12 - 3 = 9$
42+42=
答案:
84
解析:$42 + 42 = 84$
解析:$42 + 42 = 84$
80-9+16=
答案:
87
解析:$80 - 9 + 16 = 71 + 16 = 87$
解析:$80 - 9 + 16 = 71 + 16 = 87$
18÷6+18=
答案:
21
解析:$18÷6 + 18 = 3 + 18 = 21$
解析:$18÷6 + 18 = 3 + 18 = 21$
70-31=
答案:
39
解析:$70 - 31 = 39$
解析:$70 - 31 = 39$
35+(19-9)=
答案:
45
解析:$35 + (19 - 9) = 35 + 10 = 45$
解析:$35 + (19 - 9) = 35 + 10 = 45$
32-8×3=
答案:
8
解析:$32 - 8×3 = 32 - 24 = 8$
解析:$32 - 8×3 = 32 - 24 = 8$
25+29=
答案:
54
解析:$25 + 29 = 54$
解析:$25 + 29 = 54$
42-30+18=
答案:
30
解析:$42 - 30 + 18 = 12 + 18 = 30$
解析:$42 - 30 + 18 = 12 + 18 = 30$
3×4+9=
答案:
21
解析:$3×4 + 9 = 12 + 9 = 21$
解析:$3×4 + 9 = 12 + 9 = 21$
42-34=
答案:
8
解析:$42 - 34 = 8$
解析:$42 - 34 = 8$
71-(60+5)=
答案:
6
解析:$71 - (60 + 5) = 71 - 65 = 6$
解析:$71 - (60 + 5) = 71 - 65 = 6$
12÷(2×3)=
答案:
2
解析:$12÷(2×3) = 12÷6 = 2$
解析:$12÷(2×3) = 12÷6 = 2$
36+46=
答案:
82
解析:$36 + 46 = 82$
解析:$36 + 46 = 82$
39+4-20=
答案:
23
解析:$39 + 4 - 20 = 43 - 20 = 23$
解析:$39 + 4 - 20 = 43 - 20 = 23$
64÷8-2=
答案:
6
解析:$64÷8 - 2 = 8 - 2 = 6$
解析:$64÷8 - 2 = 8 - 2 = 6$
49-36=
答案:
13
解析:$49 - 36 = 13$
解析:$49 - 36 = 13$
74+(20-8)=
答案:
86
解析:$74 + (20 - 8) = 74 + 12 = 86$
解析:$74 + (20 - 8) = 74 + 12 = 86$
3÷3+19=
答案:
20
解析:$3÷3 + 19 = 1 + 19 = 20$
解析:$3÷3 + 19 = 1 + 19 = 20$
28+18=
答案:
46
解析:$28 + 18 = 46$
解析:$28 + 18 = 46$
50+8-20=
答案:
38
解析:$50 + 8 - 20 = 58 - 20 = 38$
解析:$50 + 8 - 20 = 58 - 20 = 38$
64÷8+4=
答案:
12
解析:$64÷8 + 4 = 8 + 4 = 12$
解析:$64÷8 + 4 = 8 + 4 = 12$
32+9=
答案:
41
解析:$32 + 9 = 41$
解析:$32 + 9 = 41$
70-15+22=
答案:
77
解析:$70 - 15 + 22 = 55 + 22 = 77$
解析:$70 - 15 + 22 = 55 + 22 = 77$
9×4-7=
答案:
29
解析:$9×4 - 7 = 36 - 7 = 29$
解析:$9×4 - 7 = 36 - 7 = 29$
80-33=
答案:
47
解析:$80 - 33 = 47$
解析:$80 - 33 = 47$
100-80+43=
答案:
63
解析:$100 - 80 + 43 = 20 + 43 = 63$
解析:$100 - 80 + 43 = 20 + 43 = 63$
0÷3+3=
答案:
3
解析:$0÷3 + 3 = 0 + 3 = 3$
解析:$0÷3 + 3 = 0 + 3 = 3$
95-8=
答案:
87
解析:$95 - 8 = 87$
解析:$95 - 8 = 87$
88-(43-23)=
答案:
68
解析:$88 - (43 - 23) = 88 - 20 = 68$
解析:$88 - (43 - 23) = 88 - 20 = 68$
22-12÷3=
答案:
18
解析:$22 - 12÷3 = 22 - 4 = 18$
解析:$22 - 12÷3 = 22 - 4 = 18$
35+7=
答案:
42
解析:$35 + 7 = 42$
解析:$35 + 7 = 42$
56+18-32=
答案:
42
解析:$56 + 18 - 32 = 74 - 32 = 42$
解析:$56 + 18 - 32 = 74 - 32 = 42$
36×9×0=
答案:
0
解析:$36×9×0 = 0$
解析:$36×9×0 = 0$
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