用递等式计算. (1)1292+540÷18×24 (2)1.05×(3.8-0.8)÷6.3 (3) 9 20 ÷[
用递等式计算.(1)1292+540÷18×24(2)1.05×(3.8-0.8)÷6.3(3)920÷[12×(25+45)](4)[1-(14+38)]÷1516....
用递等式计算. (1)1292+540÷18×24 (2)1.05×(3.8-0.8)÷6.3 (3) 9 20 ÷[ 1 2 ×( 2 5 + 4 5 )] (4)[1-( 1 4 + 3 8 )]÷ 15 16 .
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(1)1292+540÷18×24, =1292+30×24, =1292+720, =2012; (2)1.05×(3.8-0.8)÷6.3, =1.05×3÷6.3, =3.15÷6.3, =0.5; (3)
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