脱式计算.3.68-0.82-
脱式计算.3.68-0.82-0.183.4÷2.5÷0.43.27×99+32.7[1-(12+13)]×36....
脱式计算.3.68-0.82-0.18 3.4÷2.5÷0.4 3.27×99+32.7 [1-( 1 2 + 1 3 )]×36.
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(1)3.68-0.82-0.18 =3.68-(0.82+0.18) =3.68-1 =2.68; (2)3.4÷(2.5×0.4) =3.4÷1 =3.4; (3)3.27×99+32.7 =3.27×99+3.27×10 =3.27×(99+10) =3.27×109 =3.27×(100+10-1) =3.27×100+3.27×10-3.27 =327+32.7-3.27 =327+(32.7-3.27) =327+29.43 =356.43; (4)[1-(
=[1-
=
=6. |
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