248+89=337 ... 146-23= 123 ... 155×5=775 ...456- 12=38 ...
456+45=50 1 ...546-457=89 ...45× 10=45 1 ...564- 12=47 ...
879+54=933 ...896-546=350 ...56× 12=672....45-5=9 ...
457+456=9 13 ...
7+ 14=2 1 ... 18-9=9 ...
8+ 16=24 ...25-5=20 ...
9+ 18=27...56-45= 1 1 ...
10+20=30...45-23=22 ...
1 1+22=33...78-23=55 ...
12+24=36 ...
10-3=7
15-4= 1 1
20-5= 15
25-6= 19
30-7=23
35-8=27
40-9=3 1
45- 10=35
50- 1 1=39
55- 12=43
60- 13=47
65- 14=5 1
70- 15=55
75- 16=59
80- 17=63
85- 18=67
90- 19=7 1
95-20=75
100-2 1=79
105-22=83
1 10-23=87
1 15-24=9 1
120-25=95
125-26=99
130-27= 103
13+26=39 ...
14+28=42 ...
15+30=45 ...
16+32=48 ...
17+34=5 1 ...
18+36=54 ...
19+38=57 ...
20+40=60 ...
2 1+42=63 ...
22+44=66 ...
23+46=69 ...
24+48=72 ...
25+50=75 ...
26+52=78 ...
27+54=8 1 ...
28+56=84 ...
29+58=87 ...
30+60=90 ...
3 1+62=93 ...
32+64=96 ...
33+66=99 ...
5 ÷ 1 =5
10 ÷2 =5
15 ÷3 =5
20 ÷4 =5
25 ÷5 =5
30 ÷6 =5
35 ÷7 =5
40 ÷8 =5
45 ÷9 =5
50 ÷ 10 =5
55 ÷ 1 1 =5
60 ÷ 12 =5
65 ÷ 13 =5
70 ÷ 14 =5
75 ÷ 15 =5
80 ÷ 16 5
85 ÷ 17 5
90 ÷ 18 5
95 ÷ 19 5
100 ÷20 5
2/ 1*2= 1 3/ 1*3= 1 3/2*3=2 3/ 1*6=2 4/3*8=6 5/3*20= 12 7/3* 14=6 8/7*40=35 4/3* 16= 1 2 9/5* 27= 15 2/ 1*30= 15 12/7*24= 14 30/ 1*30= 1 5 1/9* 102= 18 19/9* 76=36 4/9*8= 18 5/8* 90= 144 99/98*99=98 3/ 14*6=28 7/ 1*28=4 10/ 1*90=9 5/3* 105=63 19/7* 38= 14 5/ 1*25=5 8/ 19* 16=38 6 1/60* 122= 120 7/2*28=8 6/ 1*48=8 9/7* 18= 1 4 25/7* 100=28 9/5*8 1=45 8/9* 16= 18
12÷3/5 = 12×(5/3)9÷6/7 = 9×(7/6)30÷5/6 = 30×(6/5)4×(3/2)= 4÷2/3(4)÷5/7 = 4×7/5 3÷4/5 = 3×5/4(24)÷7/ 16 = 24×( 15
2/ 1*2= 1 3/ 1*3= 1 3/2*3=2 3/ 1*6=2
4/3*8=6 5/3*20= 12 7/3* 14=6 8/7*40=35
4/3* 16= 12 9/5*27= 15 2/ 1*30= 15 12/7*24= 14
30/ 1*30= 1 5 1/9* 102= 18 19/9*76=36 4/9*8= 18
5/8*90= 144 99/98*99=98 3/ 14*6=28 7/ 1*28=4
10/ 1*90=9 5/3* 105=63 19/7*38= 14 5/ 1*25=5
8/ 19* 16=38 6 1/60* 122= 120 7/2*28=8 6/ 1*48=8
9/7* 18= 14 25/7* 100=28 9/5*8 1=45 8/9* 16= 18
2. Solve the equation
1.X-5.7=2. 15
2. 15 5X-2X= 18
3.3X+0.7=5
4.3.5×2= 4.2+x
5.26× 1.5= 2x+ 10
6.0.5× 16― 16×0.2=4x
7. 13 9.25-X=0.403
8. 16.9÷X=0。 three
9.X÷0.5=2.6
10 .x+ 13=33
1 1.3-5 times =80
12. 1.8 +6x=54
13 .6.7x -60.3=6.7
14.9 +4x =40
15.80*3.8=X*2.6
16.3X-X=24
17.3X-X=42
18.2X=42
19.X-99=88
20.30-X= 1
2 1.654+X=999
22 .88*X=88
23 .99*X=99
24.95*X=9025
25.85*X=7225
26.75*X=5625
27.45*X=2025
28.25*X=625
29. 15*X=225
30.65*X=4225
3X+5X = 48 14X-8X = 12 6 * 5+2X = 44
20X-50 = 50 28+6X = 88 32-22X = 10
24-3X = 3 10X *(5+ 1)= 60 99X = 100-X
X+3 = 18 X-6 = 12 56-2X = 20
4y+2=6 x+32=76 3x+6= 18
16+8x=40 2x-8=8 4x-3*9=29
8x-3x= 105 x-6*5=42 x+5=7
2x+3 = 10 12x-9x = 9 6x+ 18 = 48
56x-50x=30 5x= 15 78-5x=28
32y-29=3 5x+5= 15 89x-9=80
100-20x = 20 55x-25x = 60 76y-75 = 1
23y-23 = 23 4x-20 = 0 80y+20 = 100
53x-90 = 16 2x+9x = 1 1 12y- 12 = 24
80+5x = 100 7x-8 = 6 65x+35 = 100
19y+y = 40 25-5x = 15 79y+y = 80
42x+28x = 140 3x- 1 = 8 90y-90 = 90
80y-90 = 70 78y+2y = 160 88-x = 80
9-4x = 1 20x = 40 65y-30 = 100
5 1y-y = 100 85y+ 1 =-86 45x-50 = 40
3. Simple calculation.
45.55-(6.82+ 15.55)
34.52- 17.87- 12.23
6.43-( 1.4-0.57)
23.75-8.64-3.46
17.83-9.5-7.83-0.5
5.38+88.2-2.38+ 1.8
27.38-5.34+2.62-4.66
2 1.63-(8.5+9.63)
7.5-2.45+7.5+2.45
0.9+0.99+0.999
5.09-(0.09+ 1.23)
9.36-(4.36-3.5)
609-708+306- 108+202- 198+497- 100
14+ 15+ 16+……+45+46
9999+9998+9997+9996
99999×26+33333×22
19 175÷59+678
36.5× 1.4-8.5 1÷3.7
1.3-3.79+9.7-6.2 1
8×0.4× 12.5×2.5
125×(8+0.8+0.08)
35 ÷〔78 -(25 +38 )〕
1.7+ 150 +3.98
17.625-(4.4+58 )
3.35×6.47×2+6.7×3.6
18.7-3.375-6.625
2.5×4.4
25× 1.25×32
(3.75+4. 1+2.35)×9.8
1.28+9.8+7.72+ 10.2
12 × 1 120 + 12 ×2049
( 1)2002+98+997+9996+99995
(2)0. 1÷0. 1÷0. 1÷……÷0. 1
50 0 0. 1
(3)333……3^2
1998 3
(4) 125×32×25
(5)0.000……024÷0.000……048
200 1 0 2002 0
(6) 1^3+2^3+3^3+……+ 10^3
(7) 13579+3579 1+579 13+79 135+9 1357
(8) 1 1 1 1+2222+3333+4444
(9) 12! ÷5! ÷4! ÷3! ÷280
( 10) 1÷4÷8÷ 1.25÷0.25
( 1 1)200 1^2-2000^2+ 1999^2- 1998^2
(12) found the unit number1998×1998×1998× ... ×1998.
(13) Find the remainder of 888 ... 8 divided by 26.
1999 8