数学题(简便方法计算的)简单的.急死了~
1个回答

(10/5)*(18/13)

(19/10)*(12/5)

(5/21)*(5/17)

(21/19)*(19/14)

(19/20)*(22/8)

(15/18)*(10/14)

(3/19)*(5/8)

(19/17)*(9/17)

(15/7)*(11/8)

(15/21)*(11/16)

(6/20)*(8/17)

(7/16)*(18/16)

(4/14)*(3/15)

(5/20)*(22/20)

(5/18)*(6/23)

(12/21)*(22/16)

(20/10)*(14/13)

(4/7)*(20/20)

(13/24)*(17/20)

(4/17)*(16/10)

1125-997 =

998+1246+9989 =

(8700+870+87)÷87=

125×8.8 =

1.3+4.25+3.7+3.75=

17.15-(3.5-2.85)=

3.4×99+3.4 =

4.8×1.01 =

0.4×(2.5÷73) =

(1.6+1.6+1.6+1.6)×25 =

12.3-2.45-5.7-4.55=

0.125×0.25×64=

64.2×87+0.642×1300=

25×(8×0.4)×1.25 =

3.2×7÷3.2×7=

187.7×11-187.7=

3.8÷3.9+3.9÷0.1+0.1÷3.9 =

400÷125÷8=

1.9×4×0.5=

7.2÷8×4=