能用简便方法计算的用简便方法计算.25×1.25×32(3.75+4.1+2.15)×9.85400-2940÷28×27(20.2×0.4+7.88)÷4.2( 4 5 + 1 4 )÷ 7 3 + 7 10 10÷[ 8 3 -( 5 13 ÷ 5 26 + 2 5 )].
(1)25×1.25×32, =(25×4)×(1.25×8), =100×10, =1000; (2)(3.75+4.1+2.15)×9.8, =10×9.8, =98; (3)5400-2940÷28×27, =5400-105×27, =5400-2835, =2565; (4)(20.2×0.4+7.88)÷4.2, =(8.08+7.88)÷4.2, =15.96÷4.2, =3.8; (5)(
=
=
=
= 1
(6)10÷[
=10÷[
=10÷[
=10÷[
=10÷[
=10÷
=10×
=
=37
|
温馨提示:答案为网友推荐,仅供参考