0.25×0.28 0. 125×3.2×2.5 35×40.2

0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5

3.5× 10 1-3.5 3.5×9.9+3.5×0. 1 3.5×2.7+35×0.73

3.5×2.7-3.5×0.7 (32+5.6)÷0.8 3.5÷0.6-0.5÷0.6

4.9÷3.5 7÷0.25÷4 7÷0. 125 ÷8

7.35÷(7.35×0.25) 7.35÷(7.35÷0.25) 7.325-(5.325+ 1.7)

3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5

7.325-3.29-3.325 7.325-(5.325+ 1.7) 7.325-(5.325- 1.7)

3.29+0.73-2.29+2.27 3.29×0.25×4 0. 125×8.8

63.4÷2.5÷0.4 4.9÷ 1.4 3.9÷( 1.3×5)

(7.7+ 1.54)÷0.7 2.5×2.4 2.7÷45

0.35× 1.25×2×0.8 32.4×0.9+0. 1×32.4 15÷0.25

28.6× 10 1-28.6 0.86× 15.7-0.86× 14.7 2.4× 102

14-7.32-2.68 2.64+8.67+7.36+ 1 1.33 2.3 1× 1.2×0.5

(2.5-0.25)×0.4 9. 16× 1.5-0.5×9. 16 3.6-3.6×0.5

7.6×0.8+0.2×7.6 0.85× 199 0.25×8.5×4

0.25×36 0. 125×3.2×2.5 35×40.2

(6)8.88× 1.25

(7)34.7×0.25

(8)238÷ 1.25

(9)0.25× 12.5×3.2

( 10) 124.68+324.68+524.68+724.68+924.68

( 1 1)5795.5795÷5.7957×579.5

( 12) 1990× 198.9- 1989× 198.8

( 13)2.25×0. 16+264×0.0225+5.2×2.25+0.225×20

( 14)( 1+0.28+0.84) ×(0.28+0.84+0.66)-( 1+0.28+0.84+0.66) ×(0.28+0.84)

( 15)4.82×0.59+0.4 1× 1.59-0.323×5.9

( 16)0. 125×0.25×32

( 17) 16×4.5

( 18)0.25× 1.25×22.4

( 19)0.9+0.99+0.999+0.9999+0.99999

(20)(72×357+357×28)÷(5 1×7×4)

(2 1)98989898×99999999÷ 10 10 10 1÷ 1 1 1 1 1 1 1 1

(22)4.8×( 1 1.03- 15.6÷7.5)

(23)(67.8+9.48) ÷0.96-2.58×30.05

(24)[ 1.7+ 1.7×(5.8-2.8)]+( 1.75÷ 1.4)

(25)3.04×8.7-3.04×2.9+5.8×6.96

(26)(0. 1+0.2+0.3+0.4+…+ 1)÷5.5

(27)3. 14×6.5+4.5×3. 14-3. 14

(28) 1240×3.8+ 124×5 1+ 1.24× 1400+760×9.6+0.76×700

(29) 1÷(2÷3) ÷(3÷4) ÷(4÷5) ÷…÷( 1999÷2000)

(30) 1-2+3-4+5-6+…-98+99- 100+ 100