30.8÷[14-(9.85+1.07)]
[60-(9.5+28.9)]÷0.18
2.881÷0.43-0.24×3.5
20×[(2.44-1.8)÷0.4+0.15]
28-(3.4+1.25×2.4)
2.55×7.1+2.45×7.1
777×9+1111×3
0.8×[15.5-(3.21+5.79)]
(31.8+3.2×4)÷5
31.5×4÷(6+3)
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷1.8×0.9
36.72÷4.25×9.9
5180-705×6
24÷2.4-2.5×0.8
(4121+2389)÷7
671×15-974
0.8×[7.9-(2+5)]
469×12+1492
405×(3213-3189)
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
10x1.3
0.32x100
24+0.24
3.2x0.6
15-0.15
1.9x0.02
0.4x0.5
1.25x8
2.5x4
0.24x4
200x0.16
0.6x0.1
1.92×25=23×4×25=23×(4×25)
2. 22×11+22+288×22=22×(11+1+288)
3. (214+43+86)+257=(214+86)+(43+257)
4.578-53-92-255=578-(53+92+255)
5. 361×40×125=361×(40×125)
6.199×35=(200-1)×35
7. 365-(247-235)=365-247+235=365+235-247
8. 48×125=6×(8×125)
9.200×22=100×(2×22)
10.97×95+5×97=97×(95+5)
11. 22x98+44
12. 54+34+(66+46)
13. 25x32x8
14. (36x25)x10
15. 2/3 +(5/6+1/3)+1/6
16. 1+2+3+4+5+6+7+8+9
17. (1+3+5+7+9)-(2+4+6+7+9)
18. 90+18x85+180
19. 1-2+3-4+5-6+7-8+9
20. 375+125x92+625