420÷60 100×26 2400+300 5600÷70 320+780
90÷ 18 16×25 480+30 300-25×4 100-72÷8
689×5≈ 5430÷9≈ 3976÷8≈ 2080×4≈ 260×8≈
25 - 15 -80 = 10 -80 = -70
26 -6 -64 = 20 -64 = -44
27 + 3 -48 = 30 -48 = - 18
28 + 12 -32 = 40 -32 = 8
29 + 2 1 - 16 = 50 - 16 = 34
30 + 30 + 0 = 60 + 0 = 60
3 1 + 39 + 16 = 70 + 16 = 86
32 + 48 + 32 = 80 + 32 = 1 12
33 + 57 + 48 = 90 + 48 = 138
34 + 66 + 64 = 100 + 64 = 164
35 + 75 + 80 = 1 10 + 80 = 190
36 + 84 + 96 = 120 + 96 = 2 16
37 + 93 + 1 12 = 130 + 1 12 = 242
38 + 102 + 128 = 140 + 128 = 268
39 + 1 1 1 + 144 = 150 + 144 = 294
40 -30 - 140 = 10 - 140 = - 130
4 1 -2 1 - 124 = 20 - 124 = - 104
42 - 12 - 108 = 30 - 108 = -78
43 -3 -92 = 40 -92 = -52
44 + 6 -76 = 50 -76 = -26
45 + 15 -60 = 60 -60 = 0
46 + 24 -44 = 70 -44 = 26
47 + 33 -28 = 80 -28 = 52
48 + 42 - 12 = 90 - 12 = 78
49 + 5 1 + 4 = 100 + 4 = 104
50 + 60 + 20 = 1 10 + 20 = 130
5 1 + 69 + 36 = 120 + 36 = 156
52 + 78 + 52 = 130 + 52 = 182
53 + 87 + 68 = 140 + 68 = 208
54 + 96 + 84 = 150 + 84 = 234
55 -45 -200 = 10 -200 = - 190
56 -36 - 184 = 20 - 184 = - 164
57 -27 - 168 = 30 - 168 = - 138
58 - 18 - 152 = 40 - 152 = - 1 12
59 -9 - 136 = 50 - 136 = -86
60 + 0 - 120 = 60 - 120 = -60
6 1 + 9 - 104 = 70 - 104 = -34
62 + 18 -88 = 80 -88 = -8
63 + 27 -72 = 90 -72 = 18
64 + 36 -56 = 100 -56 = 44
65 + 45 -40 = 1 10 -40 = 70
66 + 54 -24 = 120 -24 = 96
67 + 63 -8 = 130 -8 = 122
68 + 72 + 8 = 140 + 8 = 148
69 + 8 1 + 24 = 150 + 24 = 174
70 -60 -260 = 10 -260 = -250
7 1 -5 1 -244 = 20 -244 = -224
72 -42 -228 = 30 -228 = - 198
73 -33 -2 12 = 40 -2 12 = - 172
74 -24 - 196 = 50 - 196 = - 146
1 1 3^3-5
12 4^2-34%
13 3.25-3 15%
14 7^3+445%
360÷[( 12+6)×5]
288÷[(26- 14)×8]
500×6-(50×2-80)
( 105× 12-635)÷25864÷[(27-23)× 12]
(45+38- 16)×24500-(240+38×6)
[64-(87-42)] × 15(845- 15×3)÷ 16 12×[(49-28)÷7]
450÷[(84-48] )÷ 12(58+37)÷(64-9×5)95÷(64-45)
178- 145÷5×6+428 12-700÷(9+3 1× 1 1)
85+ 14×( 14+208÷26)
(284+ 16)×(5 12-8208÷ 18)
75×27+ 19×2
53 1×870+ 13×3 10
30 vertical calculation problems:
180÷30= 720÷30= 360÷30= 920÷40= 780÷60= 960÷40=
432÷24= 625÷23= 837÷43= 850÷ 17= 780÷26= 544÷ 17=
898÷28= 420÷30= 780÷20= 690÷30= 750÷50= 840÷60=
520÷40= 920÷23= 864÷32= 840÷24= 704÷44= 480÷32=
672÷2 1= 754÷58= 897÷39= 624÷26= 576÷ 18= 173