用递等式计算:(能简算的要简算)①2.1×0.5÷4.2;②4080÷12-24×1.5;③24×( 1 4 + 2 3 - 1 6 );④ 2 5 ÷〔 5 8 ×( 9 10 + 1 6 )〕.
①2.1×0.5÷4.2, =1.05÷4.2, =0.25; ②4080÷12-24×1.5, =340-36, =304; ③24×(
=24×
=6+16-4, =22-4, =18; ④
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用递等式计算:(能简算的要简算)①2.1×0.5÷4.2;②4080÷12-24×1.5;③24×( 1 4 + 2 3 - 1 6 );④ 2 5 ÷〔 5 8 ×( 9 10 + 1 6 )〕.
①2.1×0.5÷4.2, =1.05÷4.2, =0.25; ②4080÷12-24×1.5, =340-36, =304; ③24×(
=24×
=6+16-4, =22-4, =18; ④
=
=
=
|
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