能用简便方法的用简便方法计算.105×32-3232÷32125× 3 1 3 ×0.8× 3 10 ( 1 7 - 1 9 )×63- 2 3 210.5×[(6.05-3.35)÷1.5] ( 5 6 - 3 4 )× 2 5 ÷ 1 2 0.75×16+ 3 4 ×5-75% .
(1)105×32-3232÷32, =3360-101, =3159; (2)125×3
=125×0.8×(
=100×1, =100; (3)(
=
=9-7-
=2-
=1
(4)210.5×[(6.05-3.35)÷1.5], =210.5×[(6.05-3.35)÷1.5], =210.5×[2.7÷1.5], =210.5×1.8, =378.9; (5)(
=(
=
=
(6)0.75×16+
=0.75×16+0.75×5-0.75, =(16+5-1)×0.75, =20×0.75, =15. |
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